Imperial Roman Navy, 1909 and Earlier Final Pass

[snip]

The second of the Hexagons, the Naissus class introduces VTE engines and Quick-Firing guns.

Naissus, Imperial Roman Republic Cruiser laid down 1897

Displacement:
   3,500 t light; 3,629 t standard; 4,026 t normal; 4,344 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (314.96 ft / 308.40 ft) x 42.65 ft x (20.51 / 21.75 ft)
   (96.00 m / 94.00 m) x 13.00 m  x (6.25 / 6.63 m)

Armament:
      6 - 5.51" / 140 mm 40.0 cal guns - 80.24lbs / 36.40kg shells, 125 per gun
     Quick firing guns in deck mounts, 1897 Model
     2 x Single mounts on centreline ends, evenly spread
     4 x Single mounts on side ends, evenly spread
      8 - 2.95" / 75.0 mm 45.0 cal guns - 12.98lbs / 5.89kg shells, 250 per gun
     Quick firing guns in deck mounts, 1897 Model
     6 x Single mounts on sides, evenly spread
     2 x Single mounts on sides, aft deck aft
      2 hull mounts in casemates- Limited use in all but light seas
      Weight of broadside 585 lbs / 265 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   1.18" / 30 mm   308.40 ft / 94.00 m   7.84 ft / 2.39 m
     Main Belt covers 154 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.97" / 50 mm         -               -
   2nd:   0.59" / 15 mm         -               -

   - Protected deck - single deck:
   For and Aft decks: 1.57" / 40 mm
   Forecastle: 1.18" / 30 mm  Quarter deck: 1.18" / 30 mm

   - Conning towers: Forward 5.91" / 150 mm, Aft 0.00" / 0 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 11,200 ihp / 8,355 Kw = 20.59 kts
   Range 4,750nm at 10.00 kts
   Bunker at max displacement = 715 tons (100% coal)

Complement:
   252 - 328

Cost:
   £0.399 million / $1.597 million

Distribution of weights at normal displacement:
   Armament: 93 tons, 2.3 %
      - Guns: 93 tons, 2.3 %
   Armour: 437 tons, 10.9 %
      - Belts: 106 tons, 2.6 %
      - Armament: 42 tons, 1.0 %
      - Armour Deck: 257 tons, 6.4 %
      - Conning Tower: 32 tons, 0.8 %
   Machinery: 1,794 tons, 44.6 %
   Hull, fittings & equipment: 991 tons, 24.6 %
   Fuel, ammunition & stores: 526 tons, 13.1 %
   Miscellaneous weights: 185 tons, 4.6 %
      - Hull below water: 25 tons
      - Hull above water: 90 tons
      - On freeboard deck: 60 tons
      - Above deck: 10 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,089 lbs / 947 Kg = 24.9 x 5.5 " / 140 mm shells or 0.5 torpedoes
   Stability (Unstable if below 1.00): 1.54
   Metacentric height 2.9 ft / 0.9 m
   Roll period: 10.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.17
   Seaboat quality  (Average = 1.00): 1.60

Hull form characteristics:
   Hull has low quarterdeck ,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.522 / 0.531
   Length to Beam Ratio: 7.23 : 1
   'Natural speed' for length: 17.56 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 44
   Bow angle (Positive = bow angles forward): -20.00 degrees
   Stern overhang: -3.28 ft / -1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   10.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Forward deck:   40.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Aft deck:   40.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Quarter deck:   10.00 %,  6.56 ft / 2.00 m,  6.56 ft / 2.00 m
      - Average freeboard:      14.68 ft / 4.48 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 153.8 %
      - Above water (accommodation/working, high = better): 105.3 %
   Waterplane Area: 8,940 Square feet or 831 Square metres
   Displacement factor (Displacement / loading): 89 %
   Structure weight / hull surface area: 66 lbs/sq ft or 321 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.88
      - Longitudinal: 2.89
      - Overall: 1.00
   Cramped machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Misc Distribution
--Below Water (20t)
----18t 12x350mm Torpedos (35 Pattern B)
----2t Additional Torpedo Handing Equipment
--Above Water (90t)
----10t Improved Officer Accommodations
----10t Improved Crew Accommodations
----20t Additional Troop Compliment
----25t Construction Reserve
--On Deck (60t)
----30t Additional Troop Compliment
----10t Flag Facilities
----5t Admiralty Accommodations
----15t Construction Reserve
--Above Deck (10t)
----5t Improved Aquisition Structures
----5t Additional Searchlights

[snip]

And the last of the Hexagons, the Astoa class trades some armor for additional speed and also gains minelaying capabilities.

Aosta, Imperial Roman Republic Cruiser laid down 1899

Displacement:
   3,500 t light; 3,628 t standard; 4,012 t normal; 4,319 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (314.96 ft / 308.40 ft) x 42.65 ft x (20.51 / 21.71 ft)
   (96.00 m / 94.00 m) x 13.00 m  x (6.25 / 6.62 m)

Armament:
      6 - 5.51" / 140 mm 45.0 cal guns - 79.37lbs / 36.00kg shells, 125 per gun
     Quick firing guns in deck mounts, 1897 Model
     2 x Single mounts on centreline ends, evenly spread
     4 x Single mounts on side ends, evenly spread
      8 - 2.95" / 75.0 mm 45.0 cal guns - 13.23lbs / 6.00kg shells, 250 per gun
     Quick firing guns in deck mounts, 1897 Model
     6 x Single mounts on sides, evenly spread
     2 x Single mounts on sides, aft deck aft
      2 hull mounts in casemates- Limited use in all but light seas
      Weight of broadside 582 lbs / 264 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   0.79" / 20 mm   308.40 ft / 94.00 m   7.84 ft / 2.39 m
     Main Belt covers 154 % of normal length
     Main belt does not fully cover magazines and engineering spaces

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.97" / 50 mm         -               -
   2nd:   0.59" / 15 mm         -               -

   - Protected deck - single deck:
   For and Aft decks: 1.57" / 40 mm
   Forecastle: 1.18" / 30 mm  Quarter deck: 1.18" / 30 mm

   - Conning towers: Forward 3.94" / 100 mm, Aft 0.00" / 0 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 12,000 ihp / 8,952 Kw = 20.96 kts
   Range 4,750nm at 10.00 kts
   Bunker at max displacement = 691 tons (100% coal)

Complement:
   251 - 327

Cost:
   £0.411 million / $1.642 million

Distribution of weights at normal displacement:
   Armament: 107 tons, 2.7 %
      - Guns: 107 tons, 2.7 %
   Armour: 391 tons, 9.7 %
      - Belts: 70 tons, 1.8 %
      - Armament: 42 tons, 1.0 %
      - Armour Deck: 257 tons, 6.4 %
      - Conning Tower: 21 tons, 0.5 %
   Machinery: 1,849 tons, 46.1 %
   Hull, fittings & equipment: 969 tons, 24.1 %
   Fuel, ammunition & stores: 512 tons, 12.8 %
   Miscellaneous weights: 185 tons, 4.6 %
      - Hull below water: 25 tons
      - Hull above water: 70 tons
      - On freeboard deck: 80 tons
      - Above deck: 10 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,970 lbs / 893 Kg = 23.5 x 5.5 " / 140 mm shells or 0.5 torpedoes
   Stability (Unstable if below 1.00): 1.55
   Metacentric height 2.9 ft / 0.9 m
   Roll period: 10.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 69 %
         - Recoil effect (Restricted arc if above 1.00): 0.17
   Seaboat quality  (Average = 1.00): 1.54

Hull form characteristics:
   Hull has low quarterdeck ,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.521 / 0.529
   Length to Beam Ratio: 7.23 : 1
   'Natural speed' for length: 17.56 kts
   Power going to wave formation at top speed: 56 %
   Trim (Max stability = 0, Max steadiness = 100): 45
   Bow angle (Positive = bow angles forward): -20.00 degrees
   Stern overhang: -3.28 ft / -1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   10.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Forward deck:   40.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Aft deck:   40.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Quarter deck:   10.00 %,  6.56 ft / 2.00 m,  6.56 ft / 2.00 m
      - Average freeboard:      14.68 ft / 4.48 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 158.9 %
      - Above water (accommodation/working, high = better): 105.6 %
   Waterplane Area: 8,932 Square feet or 830 Square metres
   Displacement factor (Displacement / loading): 86 %
   Structure weight / hull surface area: 65 lbs/sq ft or 317 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.89
      - Longitudinal: 2.92
      - Overall: 1.00
   Cramped machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Misc Distribution
--Below Water (25t)
----20t 10x350mm Torpedos (45 Pattern A)
----2t Additional Torpedo Handing Equipment
----5t Additional Pumps
--Above Water (70t)
----10t Improved Officer Accommodations
----10t Improved Crew Accommodations
----20t Additional Troop Compliment
----5t Construction Reserve
--On Deck (80t)
----30t Additional Troop Compliment
----10t Flag Facilities
----5t Admiralty Accommodations
----30t Mines and Minelaying Equipment
----5t Construction Reserve
--Above Deck (10t)
----5t Improved Aquisition Structures
----5t Additional Searchlights

[snip]

The last VTE cruisers of the Roman Navy, the Ovilava class sees a drastic change in armament. This does not come without issue, as the design is horribly cramped.

Ovilava, Imperial Roman Republic Cruiser laid down 1902

Displacement:
   4,800 t light; 5,021 t standard; 5,512 t normal; 5,905 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (351.05 ft / 351.05 ft) x 54.13 ft x (20.51 / 21.60 ft)
   (107.00 m / 107.00 m) x 16.50 m  x (6.25 / 6.58 m)

Armament:
      10 - 5.51" / 140 mm 50.0 cal guns - 85.98lbs / 39.00kg shells, 200 per gun
     Quick firing guns in deck and hoist mounts, 1902 Model
     2 x Single mounts on centreline ends, evenly spread
     8 x Single mounts on sides, evenly spread
      6 - 2.95" / 75.0 mm 50.0 cal guns - 13.23lbs / 6.00kg shells, 350 per gun
     Quick firing guns in deck and hoist mounts, 1902 Model
     2 x Single mounts on centreline ends, evenly spread
      2 raised mounts
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 939 lbs / 426 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.57" / 40 mm   0.39" / 10 mm      1.57" / 40 mm
   2nd:   0.59" / 15 mm   0.20" / 5 mm      1.57" / 40 mm

   - Protected deck - single deck:
   For and Aft decks: 2.76" / 70 mm
   Forecastle: 1.18" / 30 mm  Quarter deck: 1.18" / 30 mm

   - Conning towers: Forward 3.94" / 100 mm, Aft 0.00" / 0 mm

Machinery:
   Coal and oil fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 16,500 ihp / 12,309 Kw = 21.88 kts
   Range 5,500nm at 10.00 kts
   Bunker at max displacement = 884 tons (90% coal)

Complement:
   319 - 415

Cost:
   £0.617 million / $2.468 million

Distribution of weights at normal displacement:
   Armament: 290 tons, 5.3 %
      - Guns: 290 tons, 5.3 %
   Armour: 657 tons, 11.9 %
      - Armament: 51 tons, 0.9 %
      - Armour Deck: 579 tons, 10.5 %
      - Conning Tower: 26 tons, 0.5 %
   Machinery: 2,475 tons, 44.9 %
   Hull, fittings & equipment: 1,278 tons, 23.2 %
   Fuel, ammunition & stores: 712 tons, 12.9 %
   Miscellaneous weights: 100 tons, 1.8 %
      - Hull below water: 5 tons
      - Hull above water: 40 tons
      - On freeboard deck: 40 tons
      - Above deck: 15 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,324 lbs / 1,054 Kg = 27.8 x 5.5 " / 140 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.54
   Metacentric height 4.2 ft / 1.3 m
   Roll period: 11.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.26
   Seaboat quality  (Average = 1.00): 1.31

Hull form characteristics:
   Hull has low quarterdeck ,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.495 / 0.504
   Length to Beam Ratio: 6.48 : 1
   'Natural speed' for length: 18.74 kts
   Power going to wave formation at top speed: 56 %
   Trim (Max stability = 0, Max steadiness = 100): 53
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Forward deck:   30.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Aft deck:   35.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Quarter deck:   15.00 %,  6.56 ft / 2.00 m,  6.56 ft / 2.00 m
      - Average freeboard:      14.23 ft / 4.34 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 163.5 %
      - Above water (accommodation/working, high = better): 117.3 %
   Waterplane Area: 12,603 Square feet or 1,171 Square metres
   Displacement factor (Displacement / loading): 82 %
   Structure weight / hull surface area: 73 lbs/sq ft or 357 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.83
      - Longitudinal: 1.96
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Cramped machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

Misc Distribution
--Below Water (5t)
----5t Additional Pumps
--Above Water (40t)
----10t Improved Officer Accommodations
----10t Improved Crew Accommodations
----10t Short-Range Wireless
----5t Improved Ventilation
----5t Construction Reserve
--On Deck (40t)
----16t 8x450mm Torpedos (45 Pattern A)
----10t Short-Range Wireless
----4t Improved Torpedo Handling Equipment
----5t Additional Officer accommodations
----5t Construction Reserve
--Above Deck (15t)
----10t Improved Aquisition Structures
----5t Additional Searchlights

[snip]

The first turbine cruisers, the Divodurum class fixes some of the crowding issues of the Ovilava's as well as a major increase in speed.

Divodurum, Imperial Roman Republic Cruiser laid down 1904

Displacement:
   5,000 t light; 5,209 t standard; 5,847 t normal; 6,357 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (364.17 ft / 360.89 ft) x 54.13 ft x (20.51 / 21.86 ft)
   (111.00 m / 110.00 m) x 16.50 m  x (6.25 / 6.66 m)

Armament:
      8 - 5.51" / 140 mm 50.0 cal guns - 85.98lbs / 39.00kg shells, 200 per gun
     Quick firing guns in deck and hoist mounts, 1902 Model
     4 x Single mounts on centreline ends, evenly spread
     6 x Single mounts on sides, evenly spread
      6 - 2.95" / 75.0 mm 50.0 cal guns - 13.23lbs / 6.00kg shells, 350 per gun
     Quick firing guns in deck and hoist mounts, 1902 Model
     2 x Single mounts on centreline ends, evenly spread
      2 raised mounts
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 767 lbs / 348 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.57" / 40 mm   0.39" / 10 mm      1.57" / 40 mm
   2nd:   0.59" / 15 mm   0.20" / 5 mm      1.57" / 40 mm

   - Protected deck - single deck:
   For and Aft decks: 2.76" / 70 mm
   Forecastle: 1.18" / 30 mm  Quarter deck: 1.18" / 30 mm

   - Conning towers: Forward 2.95" / 75 mm, Aft 0.00" / 0 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 26,503 shp / 19,771 Kw = 24.40 kts
   Range 5,500nm at 10.00 kts
   Bunker at max displacement = 1,148 tons (90% coal)

Complement:
   333 - 434

Cost:
   £0.626 million / $2.505 million

Distribution of weights at normal displacement:
   Armament: 237 tons, 4.1 %
      - Guns: 237 tons, 4.1 %
   Armour: 675 tons, 11.5 %
      - Armament: 51 tons, 0.9 %
      - Armour Deck: 604 tons, 10.3 %
      - Conning Tower: 21 tons, 0.4 %
   Machinery: 2,624 tons, 44.9 %
   Hull, fittings & equipment: 1,349 tons, 23.1 %
   Fuel, ammunition & stores: 847 tons, 14.5 %
   Miscellaneous weights: 115 tons, 2.0 %
      - Hull below water: 5 tons
      - Hull above water: 40 tons
      - On freeboard deck: 55 tons
      - Above deck: 15 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,461 lbs / 1,116 Kg = 29.4 x 5.5 " / 140 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.41
   Metacentric height 3.6 ft / 1.1 m
   Roll period: 11.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.23
   Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
   Hull has low quarterdeck ,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.511 / 0.521
   Length to Beam Ratio: 6.67 : 1
   'Natural speed' for length: 19.00 kts
   Power going to wave formation at top speed: 61 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 0.52 ft / 0.16 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Forward deck:   30.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Aft deck:   35.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Quarter deck:   15.00 %,  6.56 ft / 2.00 m,  6.56 ft / 2.00 m
      - Average freeboard:      14.23 ft / 4.34 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 159.5 %
      - Above water (accommodation/working, high = better): 117.2 %
   Waterplane Area: 13,147 Square feet or 1,221 Square metres
   Displacement factor (Displacement / loading): 86 %
   Structure weight / hull surface area: 72 lbs/sq ft or 354 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.83
      - Longitudinal: 1.83
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Cramped machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

Misc Distribution
--Below Water (5t)
----5t Additional Pumps
--Above Water (40t)
----10t Improved Officer Accommodations
----10t Improved Crew Accommodations
----10t Short-Range Wireless
----5t Improved Ventilation
----5t Construction Reserve
--On Deck (55t)
----16t 8x450mm Torpedos (45 Pattern A)
----25t Long-Range Wireless
----4t Improved Torpedo Handling Equipment
----5t Additional Officer accommodations
----5t Construction Reserve
--Above Deck (15t)
----10t Improved Aquisition Structures
----5t Additional Searchlights

[snip]

The most modern cruisers in the Imperial Navy in 1910, the Lauri class represent a large increase in speed (via pure oil firing) and torpedo armament (triple tubes supplanting singles). They are also the first cruisers to be equipped with Fire Control.

Lauri, Imperial Roman Republic Cruiser laid down 1908

Displacement:
   4,550 t light; 4,708 t standard; 5,171 t normal; 5,541 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (459.31 ft / 452.76 ft) x 47.57 ft x (16.40 / 17.30 ft)
   (140.00 m / 138.00 m) x 14.50 m  x (5.00 / 5.27 m)

Armament:
      7 - 5.51" / 140 mm 50.0 cal guns - 85.98lbs / 39.00kg shells, 150 per gun
     Quick firing guns in deck and hoist mounts, 1902 Model
     5 x Single mounts on centreline ends, majority aft
      2 raised mounts - superfiring
     2 x Single mounts on sides, forward deck aft
      4 - 2.95" / 75.0 mm 50.0 cal guns - 13.23lbs / 6.00kg shells, 150 per gun
     Quick firing guns in deck and hoist mounts, 1902 Model
     4 x Single mounts on sides, aft evenly spread
      4 raised mounts
      Weight of broadside 655 lbs / 297 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   1.97" / 50 mm   377.30 ft / 115.00 m   8.20 ft / 2.50 m
   Ends:   0.98" / 25 mm     75.46 ft / 23.00 m   8.20 ft / 2.50 m
     Main Belt covers 128 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.97" / 50 mm         -         0.98" / 25 mm

   - Protected deck - single deck:
   For and Aft decks: 2.76" / 70 mm
   Forecastle: 1.18" / 30 mm  Quarter deck: 1.18" / 30 mm

   - Conning towers: Forward 3.94" / 100 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 34,000 shp / 25,364 Kw = 27.42 kts
   Range 7,000nm at 10.00 kts
   Bunker at max displacement = 833 tons

Complement:
   304 - 396

Cost:
   £0.471 million / $1.884 million

Distribution of weights at normal displacement:
   Armament: 202 tons, 3.9 %
      - Guns: 202 tons, 3.9 %
   Armour: 994 tons, 19.2 %
      - Belts: 264 tons, 5.1 %
      - Armament: 39 tons, 0.7 %
      - Armour Deck: 667 tons, 12.9 %
      - Conning Tower: 25 tons, 0.5 %
   Machinery: 1,717 tons, 33.2 %
   Hull, fittings & equipment: 1,462 tons, 28.3 %
   Fuel, ammunition & stores: 621 tons, 12.0 %
   Miscellaneous weights: 175 tons, 3.4 %
      - Hull below water: 5 tons
      - Hull above water: 50 tons
      - On freeboard deck: 105 tons
      - Above deck: 15 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     3,837 lbs / 1,740 Kg = 45.8 x 5.5 " / 140 mm shells or 0.8 torpedoes
   Stability (Unstable if below 1.00): 1.29
   Metacentric height 2.6 ft / 0.8 m
   Roll period: 12.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.28
   Seaboat quality  (Average = 1.00): 1.07

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.512 / 0.521
   Length to Beam Ratio: 9.52 : 1
   'Natural speed' for length: 21.28 kts
   Power going to wave formation at top speed: 56 %
   Trim (Max stability = 0, Max steadiness = 100): 47
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: 1.28 ft / 0.39 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Forward deck:   25.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Aft deck:   40.00 %,  10.66 ft / 3.25 m,  10.66 ft / 3.25 m
      - Quarter deck:   15.00 %,  10.66 ft / 3.25 m,  10.66 ft / 3.25 m
      - Average freeboard:      14.72 ft / 4.49 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 121.6 %
      - Above water (accommodation/working, high = better): 128.5 %
   Waterplane Area: 14,511 Square feet or 1,348 Square metres
   Displacement factor (Displacement / loading): 98 %
   Structure weight / hull surface area: 69 lbs/sq ft or 335 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.88
      - Longitudinal: 1.12
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room

Misc Distribution
--Below Water (5t)
----5t Additional Pumps
--Above Water (40t)
----10t Improved Officer Accommodations
----10t Improved Crew Accommodations
----10t Short-Range Wireless
----5t Improved Ventilation
----5t Construction Reserve
--On Deck (105t)
----24t 12x450mm Torpedos (45 Pattern B) [Two Tripple tube mounts per side]
----25t 1906 Fire Control
----25t Long-Range Wireless
----6t Improved Torpedo Handling Equipment
----5t Additional Officer accommodations
----15t Construction Reserve
--Above Deck (15t)
----10t Improved Aquisition Structures
----5t Additional Searchlights

[snip]

In the early 1900s, the Imperial Navy had developed a rather desperate need for a fast cruise capable of serving as a Destroyer Leader and fast scout. The Iaculum class was the result of this need. Fast, but poorly armed and armored, the class provided a needed service.

Iaculum, Roman Imperial Republic Cruiser laid down 1905

Displacement:
   3,000 t light; 3,097 t standard; 3,387 t normal; 3,619 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (413.39 ft / 410.11 ft) x 42.65 ft x (13.94 / 14.65 ft)
   (126.00 m / 125.00 m) x 13.00 m  x (4.25 / 4.47 m)

Armament:
      2 - 5.51" / 140 mm 50.0 cal guns - 85.98lbs / 39.00kg shells, 200 per gun
     Breech loading guns in deck and hoist mounts, 1902 Model
     2 x Single mounts on centreline ends, evenly spread
      4 - 2.95" / 75.0 mm 50.0 cal guns - 13.23lbs / 6.00kg shells, 350 per gun
     Quick firing guns in deck mounts, 1902 Model
     4 x Single mounts on sides, evenly spread
      Weight of broadside 225 lbs / 102 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.79" / 20 mm   0.39" / 10 mm      0.79" / 20 mm
   2nd:   0.59" / 15 mm         -               -

   - Protected deck - single deck:
   For and Aft decks: 0.59" / 15 mm
   Forecastle: 0.39" / 10 mm  Quarter deck: 0.39" / 10 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 22,000 shp / 16,412 Kw = 26.08 kts
   Range 3,500nm at 10.00 kts
   Bunker at max displacement = 523 tons (90% coal)

Complement:
   221 - 288

Cost:
   £0.367 million / $1.467 million

Distribution of weights at normal displacement:
   Armament: 64 tons, 1.9 %
      - Guns: 64 tons, 1.9 %
   Armour: 131 tons, 3.9 %
      - Armament: 12 tons, 0.3 %
      - Armour Deck: 119 tons, 3.5 %
   Machinery: 1,715 tons, 50.6 %
   Hull, fittings & equipment: 1,020 tons, 30.1 %
   Fuel, ammunition & stores: 387 tons, 11.4 %
   Miscellaneous weights: 70 tons, 2.1 %
      - Hull below water: 5 tons
      - Hull above water: 10 tons
      - On freeboard deck: 50 tons
      - Above deck: 5 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,487 lbs / 675 Kg = 17.8 x 5.5 " / 140 mm shells or 0.5 torpedoes
   Stability (Unstable if below 1.00): 1.50
   Metacentric height 2.8 ft / 0.8 m
   Roll period: 10.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.11
   Seaboat quality  (Average = 1.00): 1.39

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.486 / 0.494
   Length to Beam Ratio: 9.62 : 1
   'Natural speed' for length: 20.25 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 51
   Bow angle (Positive = bow angles forward): 5.00 degrees
   Stern overhang: 1.35 ft / 0.41 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  22.15 ft / 6.75 m,  22.15 ft / 6.75 m
      - Forward deck:   20.00 %,  22.15 ft / 6.75 m,  22.15 ft / 6.75 m
      - Aft deck:   45.00 %,  9.84 ft / 3.00 m,  9.84 ft / 3.00 m
      - Quarter deck:   15.00 %,  9.84 ft / 3.00 m,  9.84 ft / 3.00 m
      - Average freeboard:      14.76 ft / 4.50 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 170.3 %
      - Above water (accommodation/working, high = better): 135.2 %
   Waterplane Area: 11,508 Square feet or 1,069 Square metres
   Displacement factor (Displacement / loading): 84 %
   Structure weight / hull surface area: 56 lbs/sq ft or 273 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.86
      - Longitudinal: 1.31
      - Overall: 0.90
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

Misc Distribution
--Below Water (5t)
----5t Additional Pumps
--Above Water (10t)
----10t Short-Range Wireless
--On Deck (50t)
----12t 6x450mm Torpedos (45 Pattern B) [Three Single tube mounts per side]
----25t Long-Range Wireless
----13t Construction Reserve
--Above Deck (5t)
----5t Improved Aquisition Structures

[snip]

The successor to the Iaculum Class, the Marathona Class improve on the available firepower greatly while also being incredibly fast.

Marathona, Roman Imperial Republic Cruiser laid down 1908

Displacement:
   3,000 t light; 3,109 t standard; 3,292 t normal; 3,438 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (423.22 ft / 410.11 ft) x 42.65 ft x (13.94 / 14.39 ft)
   (129.00 m / 125.00 m) x 13.00 m  x (4.25 / 4.39 m)

Armament:
      4 - 5.51" / 140 mm 50.0 cal guns - 85.98lbs / 39.00kg shells, 200 per gun
     Breech loading guns in deck and hoist mounts, 1902 Model
     4 x Single mounts on centreline ends, evenly spread
      1 raised mount aft - superfiring
      2 - 2.95" / 75.0 mm 50.0 cal guns - 13.23lbs / 6.00kg shells, 350 per gun
     Quick firing guns in deck mounts, 1902 Model
     2 x Single mounts on sides, forward deck aft
      Weight of broadside 370 lbs / 168 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.79" / 20 mm   0.39" / 10 mm      0.79" / 20 mm
   2nd:   0.59" / 15 mm         -               -

   - Protected deck - single deck:
   For and Aft decks: 0.59" / 15 mm
   Forecastle: 0.39" / 10 mm  Quarter deck: 0.39" / 10 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 34,000 shp / 25,364 Kw = 29.21 kts
   Range 3,500nm at 10.00 kts
   Bunker at max displacement = 329 tons

Complement:
   216 - 282

Cost:
   £0.368 million / $1.474 million

Distribution of weights at normal displacement:
   Armament: 111 tons, 3.4 %
      - Guns: 111 tons, 3.4 %
   Armour: 133 tons, 4.1 %
      - Armament: 16 tons, 0.5 %
      - Armour Deck: 117 tons, 3.6 %
   Machinery: 1,604 tons, 48.7 %
   Hull, fittings & equipment: 1,071 tons, 32.5 %
   Fuel, ammunition & stores: 292 tons, 8.9 %
   Miscellaneous weights: 80 tons, 2.4 %
      - Hull below water: 5 tons
      - Hull above water: 10 tons
      - On freeboard deck: 50 tons
      - Above deck: 15 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,424 lbs / 646 Kg = 17.0 x 5.5 " / 140 mm shells or 0.5 torpedoes
   Stability (Unstable if below 1.00): 1.38
   Metacentric height 2.5 ft / 0.8 m
   Roll period: 11.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.21
   Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.472 / 0.478
   Length to Beam Ratio: 9.62 : 1
   'Natural speed' for length: 20.25 kts
   Power going to wave formation at top speed: 60 %
   Trim (Max stability = 0, Max steadiness = 100): 49
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 5.05 ft / 1.54 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  22.15 ft / 6.75 m,  22.15 ft / 6.75 m
      - Forward deck:   20.00 %,  22.15 ft / 6.75 m,  22.15 ft / 6.75 m
      - Aft deck:   45.00 %,  9.84 ft / 3.00 m,  9.84 ft / 3.00 m
      - Quarter deck:   15.00 %,  9.84 ft / 3.00 m,  9.84 ft / 3.00 m
      - Average freeboard:      14.76 ft / 4.50 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 169.1 %
      - Above water (accommodation/working, high = better): 136.7 %
   Waterplane Area: 11,371 Square feet or 1,056 Square metres
   Displacement factor (Displacement / loading): 82 %
   Structure weight / hull surface area: 61 lbs/sq ft or 296 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.85
      - Longitudinal: 1.39
      - Overall: 0.90
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room

Misc Distribution
--Below Water (5t)
----5t Additional Pumps
--Above Water (10t)
----10t Short-Range Wireless
--On Deck (50t)
----24t 6x450mm Torpedos (45 Pattern B) [Two Tripple tube mounts per side]
----25t Long-Range Wireless
----1t Construction Reserve
--Above Deck (15t)
----10t Improved Aquisition Structures
----5t Additional Searchlights

[snip]

The first example of the Torpedo Boat Destroyer (later shortened to Destroyer) type in the Imperial Navy. While a decent ship in her day, by 1910 the class is hopelessly obsolete and maintained to supplement the coastal defense responsibilities of the Navy.

A-Class, Roman Imperial Republic Destroyer laid down 1892

Displacement:
   400 t light; 410 t standard; 455 t normal; 492 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (200.13 ft / 196.85 ft) x 19.69 ft x (9.84 / 10.37 ft)
   (61.00 m / 60.00 m) x 6.00 m  x (3.00 / 3.16 m)

Armament:
      1 - 2.95" / 75.0 mm 45.0 cal gun - 13.23lbs / 6.00kg shells, 90 per gun
     Breech loading gun in deck mount, 1885 Model
     1 x Single mount on centreline, aft deck aft
      4 - 1.77" / 45.0 mm 40.0 cal guns - 2.76lbs / 1.25kg shells, 150 per gun
     Breech loading guns in deck mounts, 1885 Model
     4 x Single mounts on sides, evenly spread
      Weight of broadside 24 lbs / 11 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.39" / 10 mm         -               -
   2nd:   0.39" / 10 mm         -               -

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 6,500 ihp / 4,849 Kw = 24.38 kts
   Range 1,750nm at 10.00 kts
   Bunker at max displacement = 81 tons (100% coal)
     Caution: Delicate, lightweight machinery

Complement:
   49 - 64

Cost:
   £0.054 million / $0.215 million

Distribution of weights at normal displacement:
   Armament: 4 tons, 0.9 %
      - Guns: 4 tons, 0.9 %
   Armour: 5 tons, 1.0 %
      - Armament: 5 tons, 1.0 %
   Machinery: 276 tons, 60.6 %
   Hull, fittings & equipment: 99 tons, 21.8 %
   Fuel, ammunition & stores: 56 tons, 12.3 %
   Miscellaneous weights: 16 tons, 3.5 %
      - On freeboard deck: 16 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     89 lbs / 41 Kg = 6.9 x 3.0 " / 75 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.46
   Metacentric height 0.8 ft / 0.3 m
   Roll period: 9.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.07
   Seaboat quality  (Average = 1.00): 0.95

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.418 / 0.428
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 14.03 kts
   Power going to wave formation at top speed: 65 %
   Trim (Max stability = 0, Max steadiness = 100): 53
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: -6.56 ft / -2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Forward deck:   30.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Aft deck:   35.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Quarter deck:   15.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Average freeboard:      8.20 ft / 2.50 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 197.9 %
      - Above water (accommodation/working, high = better): 76.9 %
   Waterplane Area: 2,412 Square feet or 224 Square metres
   Displacement factor (Displacement / loading): 18 %
   Structure weight / hull surface area: 20 lbs/sq ft or 98 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.78
      - Overall: 0.57
   Cramped machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Misc Distribution
--On Deck (16t)
----6t 4x350mm Torpedos [Two single tube mounts per side]
----5t Improved spray protections for Torpedo tubes
----5t Construction Reserve.

[snip]

With the advent of VTE engines, the A-Class design is updated. The B-Class is much faster and mounts more 45mm weapons.

B-Class, Imperial Roman Republic Destroyer laid down 1897

Displacement:
   500 t light; 514 t standard; 567 t normal; 610 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (213.25 ft / 213.25 ft) x 22.97 ft x (9.84 / 10.33 ft)
   (65.00 m / 65.00 m) x 7.00 m  x (3.00 / 3.15 m)

Armament:
      1 - 2.95" / 75.0 mm 45.0 cal gun - 12.98lbs / 5.89kg shells, 100 per gun
     Quick firing gun in deck mount, 1897 Model
     1 x Single mount on centreline, aft deck centre
      1 raised mount aft
      6 - 1.77" / 45.0 mm 45.0 cal guns - 3.31lbs / 1.50kg shells, 150 per gun
     Quick firing guns in deck mounts, 1897 Model
     6 x Single mounts on sides, evenly spread
      Weight of broadside 33 lbs / 15 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.59" / 15 mm         -               -
   2nd:   0.59" / 15 mm         -               -

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 11,500 ihp / 8,579 Kw = 27.22 kts
   Range 2,000nm at 10.00 kts
   Bunker at max displacement = 96 tons (100% coal)
     Caution: Delicate, lightweight machinery

Complement:
   57 - 75

Cost:
   £0.068 million / $0.274 million

Distribution of weights at normal displacement:
   Armament: 6 tons, 1.1 %
      - Guns: 6 tons, 1.1 %
   Armour: 9 tons, 1.7 %
      - Armament: 9 tons, 1.7 %
   Machinery: 352 tons, 62.2 %
   Hull, fittings & equipment: 116 tons, 20.4 %
   Fuel, ammunition & stores: 67 tons, 11.8 %
   Miscellaneous weights: 16 tons, 2.8 %
      - On freeboard deck: 16 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     98 lbs / 44 Kg = 7.6 x 3.0 " / 75 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.33
   Metacentric height 0.9 ft / 0.3 m
   Roll period: 10.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.08
   Seaboat quality  (Average = 1.00): 0.61

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.412 / 0.422
   Length to Beam Ratio: 9.29 : 1
   'Natural speed' for length: 14.60 kts
   Power going to wave formation at top speed: 70 %
   Trim (Max stability = 0, Max steadiness = 100): 82
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Forward deck:   30.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Aft deck:   35.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Quarter deck:   15.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Average freeboard:      8.20 ft / 2.50 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 203.3 %
      - Above water (accommodation/working, high = better): 83.2 %
   Waterplane Area: 3,036 Square feet or 282 Square metres
   Displacement factor (Displacement / loading): 15 %
   Structure weight / hull surface area: 22 lbs/sq ft or 106 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.28
      - Overall: 0.55
   Extremely poor machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Caution: Lacks seaworthiness - very limited seakeeping ability

Misc Distribution
--On Deck (16t)
----6t 4x350mm Torpedos [Two single tube mounts per side]
----5t Improved spray protections for Torpedo tubes
----5t Construction Reserve.

[snip]

Much like the B-Class it succeeded, the C-Class was an update focused on propulsion. The change from VTE to turbines provided great improvement. The torpedo tubes are also replaced with the more powerful 450mm torpedo.

C-Class, Imperial Roman Republic Destroyer laid down 1904

Displacement:
   500 t light; 514 t standard; 592 t normal; 655 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (215.45 ft / 213.25 ft) x 22.97 ft x (9.84 / 10.55 ft)
   (65.67 m / 65.00 m) x 7.00 m  x (3.00 / 3.22 m)

Armament:
      1 - 2.95" / 75.0 mm 50.0 cal gun - 13.23lbs / 6.00kg shells, 100 per gun
     Quick firing gun in deck mount, 1902 Model
     1 x Single mount on centreline, aft deck centre
      1 raised mount aft
      6 - 1.77" / 45.0 mm 45.0 cal guns - 3.31lbs / 1.50kg shells, 150 per gun
     Quick firing guns in deck mounts, 1897 Model
     6 x Single mounts on sides, evenly spread
      Weight of broadside 33 lbs / 15 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.59" / 15 mm         -               -
   2nd:   0.59" / 15 mm         -               -

Machinery:
   Coal fired boilers, steam turbines,
   Direct drive, 2 shafts, 14,000 shp / 10,444 Kw = 28.21 kts
   Range 2,500nm at 10.00 kts
   Bunker at max displacement = 140 tons (100% coal)
     Caution: Delicate, lightweight machinery

Complement:
   59 - 78

Cost:
   £0.069 million / $0.274 million

Distribution of weights at normal displacement:
   Armament: 7 tons, 1.1 %
      - Guns: 7 tons, 1.1 %
   Armour: 9 tons, 1.6 %
      - Armament: 9 tons, 1.6 %
   Machinery: 352 tons, 59.5 %
   Hull, fittings & equipment: 116 tons, 19.5 %
   Fuel, ammunition & stores: 92 tons, 15.6 %
   Miscellaneous weights: 16 tons, 2.7 %
      - On freeboard deck: 16 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     103 lbs / 47 Kg = 8.0 x 3.0 " / 75 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.19
   Metacentric height 0.8 ft / 0.2 m
   Roll period: 11.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.09
   Seaboat quality  (Average = 1.00): 0.52

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.430 / 0.443
   Length to Beam Ratio: 9.29 : 1
   'Natural speed' for length: 14.60 kts
   Power going to wave formation at top speed: 72 %
   Trim (Max stability = 0, Max steadiness = 100): 96
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: -3.28 ft / -1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Forward deck:   30.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Aft deck:   35.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Quarter deck:   15.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Average freeboard:      8.20 ft / 2.50 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 194.7 %
      - Above water (accommodation/working, high = better): 81.4 %
   Waterplane Area: 3,075 Square feet or 286 Square metres
   Displacement factor (Displacement / loading): 21 %
   Structure weight / hull surface area: 22 lbs/sq ft or 105 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.27
      - Overall: 0.55
   Cramped machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Caution: Lacks seaworthiness - very limited seakeeping ability

Misc Distribution
--On Deck (16t)
----8t 4x450mm Torpedos [Two single tube mounts per side]
----5t Improved spray protections for Torpedo tubes
----3t Construction Reserve.

[snip]

The D-Class represent the beginning of a large capability shift in the Imperial Navy's destoyers. Large then any of the preceding classes, they also mount twin torpedo tubes and a new 100mm gun. They are also the first ships to use pure oil firing.

Destroyer D (Oil), Imperial Roman Republic Destroyer laid down 1906

Displacement:
   750 t light; 775 t standard; 850 t normal; 910 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (259.20 ft / 252.62 ft) x 26.25 ft x (11.48 / 12.00 ft)
   (79.00 m / 77.00 m) x 8.00 m  x (3.50 / 3.66 m)

Armament:
      2 - 3.94" / 100 mm 45.0 cal guns - 30.86lbs / 14.00kg shells, 175 per gun
     Quick firing guns in deck mounts, 1906 Model
     2 x Single mounts on centreline ends, evenly spread
      1 raised mount aft - superfiring
      4 - 1.77" / 45.0 mm 50.0 cal guns - 3.31lbs / 1.50kg shells, 250 per gun
     Quick firing guns in deck mounts, 1905 Model
     4 x Single mounts on sides, evenly spread
      Weight of broadside 75 lbs / 34 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.59" / 15 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 20,000 shp / 14,920 Kw = 29.98 kts
   Range 3,000nm at 10.00 kts
   Bunker at max displacement = 135 tons
     Caution: Delicate, lightweight machinery

Complement:
   78 - 102

Cost:
   £0.100 million / $0.400 million

Distribution of weights at normal displacement:
   Armament: 14 tons, 1.7 %
      - Guns: 14 tons, 1.7 %
   Armour: 3 tons, 0.3 %
      - Armament: 3 tons, 0.3 %
   Machinery: 501 tons, 58.9 %
   Hull, fittings & equipment: 188 tons, 22.1 %
   Fuel, ammunition & stores: 100 tons, 11.8 %
   Miscellaneous weights: 45 tons, 5.3 %
      - On freeboard deck: 45 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     165 lbs / 75 Kg = 5.4 x 3.9 " / 100 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.31
   Metacentric height 1.1 ft / 0.3 m
   Roll period: 10.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.13
   Seaboat quality  (Average = 1.00): 0.73

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.391 / 0.400
   Length to Beam Ratio: 9.63 : 1
   'Natural speed' for length: 15.89 kts
   Power going to wave formation at top speed: 69 %
   Trim (Max stability = 0, Max steadiness = 100): 68
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: 2.40 ft / 0.73 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Forward deck:   20.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Aft deck:   45.00 %,  6.56 ft / 2.00 m,  6.56 ft / 2.00 m
      - Quarter deck:   15.00 %,  6.56 ft / 2.00 m,  6.56 ft / 2.00 m
      - Average freeboard:      10.17 ft / 3.10 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 194.6 %
      - Above water (accommodation/working, high = better): 92.5 %
   Waterplane Area: 4,056 Square feet or 377 Square metres
   Displacement factor (Displacement / loading): 32 %
   Structure weight / hull surface area: 25 lbs/sq ft or 123 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.66
      - Overall: 0.56
   Cramped machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Misc Distribution
--On Deck (45t)
----20t 8x450mm Torpedos [Two twin tube mounts per side]
----10t Short-Range Wireless
----5t Improved spray protections for Torpedo tubes
----10t Construction Reserve.

[snip]

The most powerful destroyer in Imperial Navy service in 1910, the E-Class mount more guns, tripple torpedo tubes, and are faster than any other ship in Roman service.

E-Class, Imperial Roman Republic Destroyer laid down 1908

Displacement:
   1,000 t light; 1,036 t standard; 1,115 t normal; 1,178 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (285.43 ft / 278.87 ft) x 29.53 ft x (11.48 / 11.92 ft)
   (87.00 m / 85.00 m) x 9.00 m  x (3.50 / 3.63 m)

Armament:
      4 - 3.94" / 100 mm 45.0 cal guns - 30.86lbs / 14.00kg shells, 175 per gun
     Quick firing guns in deck mounts, 1906 Model
     2 x Single mounts on centreline ends, evenly spread
      1 raised mount aft - superfiring
     2 x Single mounts on sides, forward deck centre
      4 - 1.77" / 45.0 mm 50.0 cal guns - 3.31lbs / 1.50kg shells, 250 per gun
     Quick firing guns in deck mounts, 1905 Model
     4 x Single mounts on sides, evenly spread
      Weight of broadside 137 lbs / 62 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.59" / 15 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 24,000 shp / 17,904 Kw = 30.34 kts
   Range 3,000nm at 10.00 kts
   Bunker at max displacement = 142 tons

Complement:
   96 - 125

Cost:
   £0.131 million / $0.523 million

Distribution of weights at normal displacement:
   Armament: 25 tons, 2.2 %
      - Guns: 25 tons, 2.2 %
   Armour: 5 tons, 0.5 %
      - Armament: 5 tons, 0.5 %
   Machinery: 636 tons, 57.0 %
   Hull, fittings & equipment: 269 tons, 24.1 %
   Fuel, ammunition & stores: 115 tons, 10.3 %
   Miscellaneous weights: 65 tons, 5.8 %
      - On freeboard deck: 65 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     273 lbs / 124 Kg = 9.0 x 3.9 " / 100 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.40
   Metacentric height 1.4 ft / 0.4 m
   Roll period: 10.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 47 %
         - Recoil effect (Restricted arc if above 1.00): 0.16
   Seaboat quality  (Average = 1.00): 0.85

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.413 / 0.420
   Length to Beam Ratio: 9.44 : 1
   'Natural speed' for length: 16.70 kts
   Power going to wave formation at top speed: 69 %
   Trim (Max stability = 0, Max steadiness = 100): 51
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 0.89 ft / 0.27 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Forward deck:   45.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Aft deck:   25.00 %,  6.56 ft / 2.00 m,  6.56 ft / 2.00 m
      - Quarter deck:   10.00 %,  6.56 ft / 2.00 m,  6.56 ft / 2.00 m
      - Average freeboard:      12.43 ft / 3.79 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 190.3 %
      - Above water (accommodation/working, high = better): 125.3 %
   Waterplane Area: 5,108 Square feet or 475 Square metres
   Displacement factor (Displacement / loading): 44 %
   Structure weight / hull surface area: 28 lbs/sq ft or 138 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 2.06
      - Overall: 0.57
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Misc Distribution
--On Deck (65t)
----24t 12x450mm Torpedos [Two triple tube mounts per side]
----12t 6x450mm Torpedo reloads
----4t Improved torpedo reload equipment.
----10t Short-Range Wireless
----5t Improved spray protections for Torpedo tubes
----10t Construction Reserve.

[snip]

The first dedicated Torpedo Boat, the A-Class was a resounding disapointment.

Torpedo Boat A, Imperial Roman Navy Torpedo Boat laid down 1890

Displacement:
   250 t light; 256 t standard; 274 t normal; 288 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (137.80 ft / 131.23 ft) x 18.04 ft x (9.84 / 10.18 ft)
   (42.00 m / 40.00 m) x 5.50 m  x (3.00 / 3.10 m)

Armament:
      2 - 1.77" / 45.0 mm 40.0 cal guns - 2.76lbs / 1.25kg shells, 60 per gun
     Breech loading guns in deck mounts, 1885 Model
     2 x Single mounts on centreline, forward evenly spread
      Weight of broadside 6 lbs / 3 kg

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 6,000 ihp / 4,476 Kw = 23.98 kts
   Range 850nm at 10.00 kts
   Bunker at max displacement = 32 tons (100% coal)
     Caution: Delicate, lightweight machinery

Complement:
   33 - 43

Cost:
   £0.034 million / $0.135 million

Distribution of weights at normal displacement:
   Armament: 1 tons, 0.3 %
      - Guns: 1 tons, 0.3 %
   Machinery: 177 tons, 64.5 %
   Hull, fittings & equipment: 69 tons, 25.1 %
   Fuel, ammunition & stores: 24 tons, 8.6 %
   Miscellaneous weights: 4 tons, 1.5 %
      - On freeboard deck: 4 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     50 lbs / 23 Kg = 17.9 x 1.8 " / 45 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.24
   Metacentric height 0.6 ft / 0.2 m
   Roll period: 10.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.03
   Seaboat quality  (Average = 1.00): 0.64

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.411 / 0.418
   Length to Beam Ratio: 7.27 : 1
   'Natural speed' for length: 11.46 kts
   Power going to wave formation at top speed: 77 %
   Trim (Max stability = 0, Max steadiness = 100): 79
   Bow angle (Positive = bow angles forward): -30.00 degrees
   Stern overhang: -4.92 ft / -1.50 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Forward deck:   30.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Aft deck:   35.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Quarter deck:   15.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Average freeboard:      8.20 ft / 2.50 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 208.8 %
      - Above water (accommodation/working, high = better): 69.5 %
   Waterplane Area: 1,468 Square feet or 136 Square metres
   Displacement factor (Displacement / loading): 12 %
   Structure weight / hull surface area: 21 lbs/sq ft or 100 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 4.97
      - Overall: 0.63
   Caution: Hull subject to strain in open-sea
   Extremely poor machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Caution: Lacks seaworthiness - very limited seakeeping ability
Misc Distribution
--On Deck (4t)
----3t 2x350mm Torpedos [Two single mounts on centerline]
----1t Improved spray protection for torpedos

[snip]

The following class to the already disappointing A-Class were there B-Class Torpedo Boats. Somehow managing to surpass the dissatisfaction of the A-Class, the B-Class were the last of their kind in the Imperial Navy.

B-Class, Imperial Roman Navy Torpedo Boat laid down 1897

Displacement:
   280 t light; 286 t standard; 306 t normal; 322 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (134.51 ft / 131.23 ft) x 18.04 ft x (9.84 / 10.21 ft)
   (41.00 m / 40.00 m) x 5.50 m  x (3.00 / 3.11 m)

Armament:
      4 - 1.77" / 45.0 mm 45.0 cal guns - 3.31lbs / 1.50kg shells, 60 per gun
     Quick firing guns in deck mounts, 1897 Model
     2 x Single mounts on centreline, forward evenly spread
     2 x Single mounts on sides, forward deck centre
      Weight of broadside 13 lbs / 6 kg

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 10,000 ihp / 7,460 Kw = 26.19 kts
   Range 1,000nm at 10.00 kts
   Bunker at max displacement = 36 tons (100% coal)
     Caution: Delicate, lightweight machinery

Complement:
   36 - 47

Cost:
   £0.039 million / $0.155 million

Distribution of weights at normal displacement:
   Armament: 3 tons, 0.8 %
      - Guns: 3 tons, 0.8 %
   Machinery: 203 tons, 66.3 %
   Hull, fittings & equipment: 70 tons, 23.0 %
   Fuel, ammunition & stores: 26 tons, 8.6 %
   Miscellaneous weights: 4 tons, 1.3 %
      - On freeboard deck: 4 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     49 lbs / 22 Kg = 17.7 x 1.8 " / 45 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.21
   Metacentric height 0.5 ft / 0.2 m
   Roll period: 10.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 33 %
         - Recoil effect (Restricted arc if above 1.00): 0.06
   Seaboat quality  (Average = 1.00): 0.27

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.460 / 0.466
   Length to Beam Ratio: 7.27 : 1
   'Natural speed' for length: 11.46 kts
   Power going to wave formation at top speed: 82 %
   Trim (Max stability = 0, Max steadiness = 100): 83
   Bow angle (Positive = bow angles forward): -25.00 degrees
   Stern overhang: -4.92 ft / -1.50 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Forward deck:   30.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Aft deck:   35.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Quarter deck:   15.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Average freeboard:      8.20 ft / 2.50 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 215.6 %
      - Above water (accommodation/working, high = better): 66.1 %
   Waterplane Area: 1,522 Square feet or 141 Square metres
   Displacement factor (Displacement / loading): 9 %
   Structure weight / hull surface area: 21 lbs/sq ft or 102 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 4.97
      - Overall: 0.63
   Extremely poor machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Caution: Lacks seaworthiness - very limited seakeeping ability

--On Deck (4t)
----3t 2x350mm Torpedos [Two single mounts on centerline]
----1t Improved spray protection for torpedos

[snip]

The oldest general purpous Sloop, the Custodi Classes form the backbone of the Imperial Navy's coastal security forces. The basic design was first built in 1890 and has three sub-variants with various technolgical improvements.

Custodi I, Imperial Roman Navy Sloop laid down 1890

Displacement:
   500 t light; 520 t standard; 596 t normal; 657 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (187.00 ft / 183.73 ft) x 26.25 ft x (9.84 / 10.58 ft)
   (57.00 m / 56.00 m) x 8.00 m  x (3.00 / 3.22 m)

Armament:
      1 - 5.51" / 140 mm 45.0 cal gun - 79.37lbs / 36.00kg shells, 50 per gun
     Breech loading gun in deck mount, 1890 Model
     1 x Single mount on centreline, forward deck centre
      2 - 2.95" / 75.0 mm 45.0 cal guns - 13.23lbs / 6.00kg shells, 150 per gun
     Breech loading guns in deck mounts, 1890 Model
     2 x Single mounts on sides, aft deck centre
      4 - 1.77" / 45.0 mm 45.0 cal guns - 2.76lbs / 1.25kg shells, 500 per gun
     Breech loading guns in deck mounts, 1885 Model
     4 x Single mounts on sides, evenly spread
      Weight of broadside 117 lbs / 53 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.59" / 15 mm         -               -
   2nd:   0.59" / 15 mm         -               -

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 1 shaft, 675 ihp / 504 Kw = 13.02 kts
   Range 2,500nm at 10.00 kts
   Bunker at max displacement = 137 tons (100% coal)

Complement:
   59 - 78

Cost:
   £0.042 million / $0.167 million

Distribution of weights at normal displacement:
   Armament: 19 tons, 3.2 %
      - Guns: 19 tons, 3.2 %
   Armour: 4 tons, 0.7 %
      - Armament: 4 tons, 0.7 %
   Machinery: 131 tons, 22.0 %
   Hull, fittings & equipment: 188 tons, 31.5 %
   Fuel, ammunition & stores: 96 tons, 16.0 %
   Miscellaneous weights: 158 tons, 26.5 %
      - Hull below water: 3 tons
      - Hull above water: 95 tons
      - On freeboard deck: 50 tons
      - Above deck: 10 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     722 lbs / 328 Kg = 8.6 x 5.5 " / 140 mm shells or 0.5 torpedoes
   Stability (Unstable if below 1.00): 1.27
   Metacentric height 1.0 ft / 0.3 m
   Roll period: 10.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.18
   Seaboat quality  (Average = 1.00): 1.92

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.440 / 0.451
   Length to Beam Ratio: 7.00 : 1
   'Natural speed' for length: 13.55 kts
   Power going to wave formation at top speed: 40 %
   Trim (Max stability = 0, Max steadiness = 100): 37
   Bow angle (Positive = bow angles forward): 5.00 degrees
   Stern overhang: 2.56 ft / 0.78 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Forward deck:   30.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Aft deck:   35.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Quarter deck:   15.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Average freeboard:      8.20 ft / 2.50 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 99.2 %
      - Above water (accommodation/working, high = better): 76.8 %
   Waterplane Area: 2,901 Square feet or 270 Square metres
   Displacement factor (Displacement / loading): 124 %
   Structure weight / hull surface area: 40 lbs/sq ft or 197 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.90
      - Longitudinal: 2.44
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Custodi II, Imperial Roman Navy Sloop laid down 1895

Displacement:
   500 t light; 519 t standard; 603 t normal; 670 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (187.00 ft / 183.73 ft) x 26.25 ft x (9.84 / 10.64 ft)
   (57.00 m / 56.00 m) x 8.00 m  x (3.00 / 3.24 m)

Armament:
      1 - 5.51" / 140 mm 45.0 cal gun - 79.37lbs / 36.00kg shells, 50 per gun
     Breech loading gun in deck mount, 1890 Model
     1 x Single mount on centreline, forward deck centre
      2 - 2.95" / 75.0 mm 45.0 cal guns - 12.98lbs / 5.89kg shells, 150 per gun
     Breech loading guns in deck mounts, 1890 Model
     2 x Single mounts on sides, aft deck centre
      4 - 1.77" / 45.0 mm 45.0 cal guns - 2.80lbs / 1.27kg shells, 500 per gun
     Breech loading guns in deck mounts, 1890 Model
     4 x Single mounts on sides, evenly spread
      Weight of broadside 117 lbs / 53 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.59" / 15 mm         -               -
   2nd:   0.59" / 15 mm         -               -

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 1 shaft, 700 ihp / 522 Kw = 13.11 kts
   Range 3,000nm at 10.00 kts
   Bunker at max displacement = 150 tons (100% coal)

Complement:
   60 - 79

Cost:
   £0.042 million / $0.166 million

Distribution of weights at normal displacement:
   Armament: 19 tons, 3.2 %
      - Guns: 19 tons, 3.2 %
   Armour: 4 tons, 0.7 %
      - Armament: 4 tons, 0.7 %
   Machinery: 130 tons, 21.5 %
   Hull, fittings & equipment: 179 tons, 29.7 %
   Fuel, ammunition & stores: 103 tons, 17.1 %
   Miscellaneous weights: 168 tons, 27.9 %
      - Hull below water: 8 tons
      - Hull above water: 90 tons
      - On freeboard deck: 50 tons
      - Above deck: 20 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     741 lbs / 336 Kg = 8.8 x 5.5 " / 140 mm shells or 0.5 torpedoes
   Stability (Unstable if below 1.00): 1.26
   Metacentric height 1.0 ft / 0.3 m
   Roll period: 10.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.18
   Seaboat quality  (Average = 1.00): 1.93

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.445 / 0.457
   Length to Beam Ratio: 7.00 : 1
   'Natural speed' for length: 13.55 kts
   Power going to wave formation at top speed: 41 %
   Trim (Max stability = 0, Max steadiness = 100): 37
   Bow angle (Positive = bow angles forward): 5.00 degrees
   Stern overhang: 2.56 ft / 0.78 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Forward deck:   30.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Aft deck:   35.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Quarter deck:   15.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Average freeboard:      8.20 ft / 2.50 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 97.4 %
      - Above water (accommodation/working, high = better): 75.9 %
   Waterplane Area: 2,915 Square feet or 271 Square metres
   Displacement factor (Displacement / loading): 123 %
   Structure weight / hull surface area: 38 lbs/sq ft or 187 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.91
      - Longitudinal: 2.43
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Custodi III, Imperial Roman Navy Sloop laid down 1897

Displacement:
   500 t light; 520 t standard; 615 t normal; 691 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (187.00 ft / 183.73 ft) x 26.25 ft x (9.84 / 10.75 ft)
   (57.00 m / 56.00 m) x 8.00 m  x (3.00 / 3.28 m)

Armament:
      1 - 5.51" / 140 mm 45.0 cal gun - 84.44lbs / 38.30kg shells, 50 per gun
     Quick firing gun in deck mount, 1897 Model
     1 x Single mount on centreline, forward deck centre
      2 - 2.95" / 75.0 mm 45.0 cal guns - 12.98lbs / 5.89kg shells, 150 per gun
     Quick firing guns in deck mounts, 1897 Model
     2 x Single mounts on sides, aft deck centre
      4 - 1.77" / 45.0 mm 45.0 cal guns - 2.80lbs / 1.27kg shells, 500 per gun
     Quick firing guns in deck mounts, 1897 Model
     4 x Single mounts on sides, evenly spread
      Weight of broadside 122 lbs / 55 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.59" / 15 mm         -               -
   2nd:   0.59" / 15 mm         -               -

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 1 shaft, 750 ihp / 560 Kw = 13.31 kts
   Range 3,500nm at 10.00 kts
   Bunker at max displacement = 171 tons (100% coal)

Complement:
   61 - 80

Cost:
   £0.041 million / $0.163 million

Distribution of weights at normal displacement:
   Armament: 22 tons, 3.6 %
      - Guns: 22 tons, 3.6 %
   Armour: 4 tons, 0.7 %
      - Armament: 4 tons, 0.7 %
   Machinery: 123 tons, 20.0 %
   Hull, fittings & equipment: 173 tons, 28.1 %
   Fuel, ammunition & stores: 115 tons, 18.7 %
   Miscellaneous weights: 178 tons, 28.9 %
      - Hull below water: 8 tons
      - Hull above water: 100 tons
      - On freeboard deck: 50 tons
      - Above deck: 20 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     776 lbs / 352 Kg = 9.3 x 5.5 " / 140 mm shells or 0.5 torpedoes
   Stability (Unstable if below 1.00): 1.25
   Metacentric height 1.0 ft / 0.3 m
   Roll period: 11.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.19
   Seaboat quality  (Average = 1.00): 1.93

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.454 / 0.467
   Length to Beam Ratio: 7.00 : 1
   'Natural speed' for length: 13.55 kts
   Power going to wave formation at top speed: 42 %
   Trim (Max stability = 0, Max steadiness = 100): 37
   Bow angle (Positive = bow angles forward): 5.00 degrees
   Stern overhang: 2.56 ft / 0.78 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Forward deck:   30.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Aft deck:   35.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Quarter deck:   15.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Average freeboard:      8.20 ft / 2.50 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 93.8 %
      - Above water (accommodation/working, high = better): 75.3 %
   Waterplane Area: 2,941 Square feet or 273 Square metres
   Displacement factor (Displacement / loading): 127 %
   Structure weight / hull surface area: 38 lbs/sq ft or 183 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.91
      - Longitudinal: 2.40
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather