Imperial Roman Navy, 1909 and Earlier Final Pass

[snip]

This thread is going to contain all designs considered final for the Roman Navy. I will try and keep a master list updated below. Will add numbers as the overall tonnage requirements begin to finalize.

Battleships
Gloriosum Class: Two Ships
Emperor Hadrian IX Class: Two Ships
Imperito Class: Two Ships
Triumphus Class: Two Ships
Emperor Trajan VIII Class: Two Ships
Invicta Class: Two Ships
Praeventores Class: Two Ships

Armored Cruisers
Pegasum Class: One Ship
Excursor Class: Two Ships
Argonauta Class: One Ship

Cruisers
Ariminum Class: Eight Ships
Naissus Class: Four Ships
Aosta Class: Four Ships
Ovilava Class: Four ships
Divodurum Class: Four Ships
Lauri Class: Four Ships
Iaculum Class: Four Ships
Marathona Class: Four Ships


Destroyers, Torpedo Boats, and Other Light Combat Vessels
A-Class Destroyer: Ten Ships
B-Class Destroyer: Ten Ships
C-Class Destroyer: Ten Ships
D-Class Destroyer: Ten Ships
E-Class Destroyer: Ten Ships
A-Class Torpedo Boat: Six Ships
B-Class Torpedo Boat: Eight Ships
C-Class Motor Torpedo Boat: 40 Ships [Standard Type A 40t MTB]
A-Class Submarine: Nine Ships [Standard 1900 125t Sub]
B-Class Submarine: 11 Ships [Standard 1905 500t Sub]

Sloops, Tenders, and Other Auxiliary Vessels
Custodi Type Sloops: Ten Type I, Five Type II, Ten Type III
Vigil Type Sloops: Five Type I, Ten Type II, Ten Type III
Silice Type Tenders: Two Type I, Two Type II
Faber Ferrarius Tender: One Ship

[snip]

The oldest class of battleship still on the naval lists as of 1910, the Gloriosum class battleship also represents the first major step away from smaller, less seaworthy coastal defense ships. The class is also the first to use the combination of a fully enclosed turret on a barbette. As such, the class has some flaws when compared with later contemporaries. Maintained at this point for the role she displaced, retirement from any likelihood of frontline service is likely coming within a few years.

Gloriosum, Imperial Roman Republic Battleship laid down 1890

Displacement:
   11,000 t light; 11,431 t standard; 12,184 t normal; 12,787 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (360.89 ft / 354.33 ft) x 75.46 ft x (26.25 / 27.32 ft)
   (110.00 m / 108.00 m) x 23.00 m  x (8.00 / 8.33 m)

Armament:
      2 - 13.39" / 340 mm 30.0 cal guns - 1,102.31lbs / 500.00kg shells, 60 per gun
     Breech loading guns in turret on barbette mounts, 1890 Model
     2 x Single mounts on centreline ends, evenly spread
      16 - 5.51" / 140 mm 45.0 cal guns - 79.37lbs / 36.00kg shells, 125 per gun
     Breech loading guns in casemate mounts, 1890 Model
     16 x Single mounts on sides, evenly spread
      8 hull mounts in casemates- Limited use in heavy seas
      12 - 2.95" / 75.0 mm 45.0 cal guns - 13.23lbs / 6.00kg shells, 250 per gun
     Breech loading guns in deck mounts, 1890 Model
     12 x Single mounts on sides, evenly spread
      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 side ends, evenly spread
      Weight of broadside 3,644 lbs / 1,653 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.8" / 350 mm   206.07 ft / 62.81 m   12.30 ft / 3.75 m
   Ends:   5.91" / 150 mm   148.23 ft / 45.18 m   9.84 ft / 3.00 m
   Upper:   3.94" / 100 mm   206.07 ft / 62.81 m   8.20 ft / 2.50 m
     Main Belt covers 89 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   15.0" / 380 mm   9.84" / 250 mm      15.0" / 380 mm
   2nd:   3.94" / 100 mm   0.98" / 25 mm      3.94" / 100 mm
   3rd:   0.59" / 15 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 1.97" / 50 mm
   Forecastle: 0.98" / 25 mm  Quarter deck: 0.98" / 25 mm

   - Conning towers: Forward 14.96" / 380 mm, Aft 0.00" / 0 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 14,000 ihp / 10,444 Kw = 18.20 kts
   Range 4,000nm at 10.00 kts
   Bunker at max displacement = 1,356 tons (100% coal)

Complement:
   579 - 753

Cost:
   £0.976 million / $3.902 million

Distribution of weights at normal displacement:
   Armament: 543 tons, 4.5 %
      - Guns: 543 tons, 4.5 %
   Armour: 4,088 tons, 33.6 %
      - Belts: 2,306 tons, 18.9 %
      - Armament: 977 tons, 8.0 %
      - Armour Deck: 635 tons, 5.2 %
      - Conning Tower: 171 tons, 1.4 %
   Machinery: 2,718 tons, 22.3 %
   Hull, fittings & equipment: 3,491 tons, 28.7 %
   Fuel, ammunition & stores: 1,184 tons, 9.7 %
   Miscellaneous weights: 160 tons, 1.3 %
      - Hull below water: 20 tons
      - Hull above water: 40 tons
      - On freeboard deck: 80 tons
      - Above deck: 20 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     15,328 lbs / 6,953 Kg = 12.8 x 13.4 " / 340 mm shells or 2.0 torpedoes
   Stability (Unstable if below 1.00): 1.45
   Metacentric height 6.2 ft / 1.9 m
   Roll period: 12.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.29
   Seaboat quality  (Average = 1.00): 1.49

Hull form characteristics:
   Hull has low quarterdeck ,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.608 / 0.613
   Length to Beam Ratio: 4.70 : 1
   'Natural speed' for length: 18.82 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 47
   Bow angle (Positive = bow angles forward): -20.00 degrees
   Stern overhang: -8.20 ft / -2.50 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.92 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Forward deck:   30.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Aft deck:   28.16 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Quarter deck:   20.92 %,  9.84 ft / 3.00 m,  9.84 ft / 3.00 m
      - Average freeboard:      16.98 ft / 5.17 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 89.5 %
      - Above water (accommodation/working, high = better): 122.2 %
   Waterplane Area: 19,697 Square feet or 1,830 Square metres
   Displacement factor (Displacement / loading): 104 %
   Structure weight / hull surface area: 133 lbs/sq ft or 649 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.89
      - Longitudinal: 2.94
      - Overall: 1.00
   Adequate 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 (20t)
----18t 12x350mm Torpedos (35 Pattern A)
----2t Additional Torpedo Handling Equipment
--Above Water (40t)
----30t Flag Facilities
----10t Construction Reserve
--On Deck (80t)
----30t Flag Facilties
----30t Additional Troop Acomidations
----20t Construction Reserve
--Above Deck (20t)
----15t Improved Aquisition Structures
----5t Additional Searchlights

Weapons List
--340mm Patern A
--140mm Patern A
--75mm Patern A
--45mm Patern A

[snip]

Representing the adoption of the conventional twin main battery turrets, the Emperor Hadrian IX class provides a major increase in firepower over the Gloriosum class. Like the Gloriosum, the Hadrian IX's maintain some vestiges of their coastal defense ship heritage. They also have trouble maintaining 18knts in all but ideal conditions.

Emperor Hadrian IX, Imperial Roman Republic Battleship laid down 1893

Displacement:
   13,500 t light; 14,129 t standard; 15,044 t normal; 15,776 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (400.26 ft / 393.70 ft) x 78.74 ft x (26.25 / 27.33 ft)
   (122.00 m / 120.00 m) x 24.00 m  x (8.00 / 8.33 m)

Armament:
      4 - 13.39" / 340 mm 35.0 cal guns - 1,124.36lbs / 510.00kg shells, 70 per gun
     Breech loading guns in turret on barbette mounts, 1893 Model
     2 x Twin mounts on centreline ends, evenly spread
      4 - 8.27" / 210 mm 40.0 cal guns - 242.51lbs / 110.00kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1893 Model
     4 x Single mounts on sides, evenly spread
      10 - 5.51" / 140 mm 40.0 cal guns - 79.37lbs / 36.00kg shells, 175 per gun
     Breech loading guns in casemate mounts, 1890 Model
     10 x Single mounts on sides, evenly spread
      10 hull mounts in casemates- Limited use in heavy seas
      12 - 2.95" / 75.0 mm 45.0 cal guns - 13.23lbs / 6.00kg shells, 250 per gun
     Breech loading guns in deck mounts, 1890 Model
     12 x Single mounts on sides, evenly spread
      6 raised mounts
      Weight of broadside 6,420 lbs / 2,912 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   11.8" / 300 mm   231.73 ft / 70.63 m   12.30 ft / 3.75 m
   Ends:   5.91" / 150 mm   161.94 ft / 49.36 m   9.84 ft / 3.00 m
   Upper:   3.94" / 100 mm   231.73 ft / 70.63 m   8.20 ft / 2.50 m
     Main Belt covers 91 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   15.0" / 380 mm   9.84" / 250 mm      13.4" / 340 mm
   2nd:   5.91" / 150 mm   3.94" / 100 mm      5.91" / 150 mm
   3rd:   3.94" / 100 mm   0.98" / 25 mm      3.94" / 100 mm
   4th:   0.59" / 15 mm         -               -

   - Armoured deck - multiple decks:
   For and Aft decks: 1.97" / 50 mm
   Forecastle: 0.98" / 25 mm  Quarter deck: 0.98" / 25 mm

   - Conning towers: Forward 9.84" / 250 mm, Aft 0.00" / 0 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 15,000 ihp / 11,190 Kw = 18.06 kts
   Range 4,500nm at 10.00 kts
   Bunker at max displacement = 1,647 tons (100% coal)

Complement:
   678 - 882

Cost:
   £1.327 million / $5.308 million

Distribution of weights at normal displacement:
   Armament: 1,005 tons, 6.7 %
      - Guns: 1,005 tons, 6.7 %
   Armour: 4,746 tons, 31.5 %
      - Belts: 2,291 tons, 15.2 %
      - Armament: 1,561 tons, 10.4 %
      - Armour Deck: 765 tons, 5.1 %
      - Conning Tower: 129 tons, 0.9 %
   Machinery: 2,830 tons, 18.8 %
   Hull, fittings & equipment: 4,724 tons, 31.4 %
   Fuel, ammunition & stores: 1,544 tons, 10.3 %
   Miscellaneous weights: 195 tons, 1.3 %
      - Hull below water: 25 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):
     17,859 lbs / 8,101 Kg = 14.9 x 13.4 " / 340 mm shells or 2.1 torpedoes
   Stability (Unstable if below 1.00): 1.34
   Metacentric height 5.9 ft / 1.8 m
   Roll period: 13.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.51
   Seaboat quality  (Average = 1.00): 1.48

Hull form characteristics:
   Hull has low quarterdeck ,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.647 / 0.652
   Length to Beam Ratio: 5.00 : 1
   'Natural speed' for length: 19.84 kts
   Power going to wave formation at top speed: 51 %
   Trim (Max stability = 0, Max steadiness = 100): 47
   Bow angle (Positive = bow angles forward): -15.00 degrees
   Stern overhang: -8.20 ft / -2.50 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.57 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Forward deck:   30.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Aft deck:   28.86 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Quarter deck:   20.57 %,  9.84 ft / 3.00 m,  9.84 ft / 3.00 m
      - Average freeboard:      17.01 ft / 5.18 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 90.1 %
      - Above water (accommodation/working, high = better): 125.5 %
   Waterplane Area: 23,683 Square feet or 2,200 Square metres
   Displacement factor (Displacement / loading): 101 %
   Structure weight / hull surface area: 155 lbs/sq ft or 759 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.90
      - Longitudinal: 2.55
      - Overall: 1.00
   Adequate 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 (25t)
----18t 12x350mm Torpedos (35 Pattern A)
----2t Additional Torpedo Handing Equipment
----5t Additional Pumps
--Above Water(100t)
----30t Flag Facilities
----30t Additional Troop Accommodations
----10t Improved Officer Accommodations
----20t Improved Crew Accommodations
----10t Construction Reserve
--On Deck (50t)
----30t Flag Facilities
----10t Admiralty Accommodations
----10t Construction Reserve
--Above Deck (20t)
----15t Improved Aquisition Structures
----5t Additional Searchlights

Weapons List
--340mm Patern B
--210mm Patern A
--140mm Patern A
--75mm Patern A

[snip]

The Imperito class introduces two key innovations to the Imperial Navy's battleships, VTE Engines and Quick-Firing secondaries. These improvements allow for her to possess the first truly modern armor layout of a Roman capital ship.

Imperito, Imperial Roman Republic Battleship laid down 1897

Displacement:
   14,500 t light; 15,148 t standard; 16,042 t normal; 16,757 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (433.07 ft / 426.51 ft) x 78.74 ft x (26.25 / 27.23 ft)
   (132.00 m / 130.00 m) x 24.00 m  x (8.00 / 8.30 m)

Armament:
      4 - 13.39" / 340 mm 35.0 cal guns - 1,124.36lbs / 510.00kg shells, 70 per gun
     Breech loading guns in turret on barbette mounts, 1893 Model
     2 x Twin mounts on centreline ends, evenly spread
      4 - 8.27" / 210 mm 40.0 cal guns - 242.51lbs / 110.00kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1893 Model
     4 x Single mounts on sides, evenly spread
      10 - 5.51" / 140 mm 45.0 cal guns - 79.37lbs / 36.00kg shells, 175 per gun
     Quick firing guns in casemate mounts, 1897 Model
     10 x Single mounts on sides, evenly spread
      10 hull mounts in casemates- Limited use in heavy seas
      12 - 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
     12 x Single mounts on sides, evenly spread
      6 raised mounts
      Weight of broadside 6,417 lbs / 2,911 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   11.8" / 300 mm   247.38 ft / 75.40 m   18.04 ft / 5.50 m
   Ends:   4.72" / 120 mm   179.10 ft / 54.59 m   9.84 ft / 3.00 m
   Upper:   3.94" / 100 mm   247.38 ft / 75.40 m   9.02 ft / 2.75 m
     Main Belt covers 89 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   15.0" / 380 mm   9.84" / 250 mm      15.0" / 380 mm
   2nd:   5.91" / 150 mm   3.94" / 100 mm      5.91" / 150 mm
   3rd:   3.94" / 100 mm   0.98" / 25 mm      3.94" / 100 mm
   4th:   0.59" / 15 mm         -               -

   - Armoured deck - multiple decks:
   For and Aft decks: 2.36" / 60 mm
   Forecastle: 0.98" / 25 mm  Quarter deck: 0.98" / 25 mm

   - Conning towers: Forward 9.84" / 250 mm, Aft 0.00" / 0 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 15,000 ihp / 11,190 Kw = 18.05 kts
   Range 4,500nm at 10.00 kts
   Bunker at max displacement = 1,609 tons (100% coal)

Complement:
   712 - 926

Cost:
   £1.316 million / $5.265 million

Distribution of weights at normal displacement:
   Armament: 1,047 tons, 6.5 %
      - Guns: 1,047 tons, 6.5 %
   Armour: 5,908 tons, 36.8 %
      - Belts: 3,171 tons, 19.8 %
      - Armament: 1,644 tons, 10.3 %
      - Armour Deck: 958 tons, 6.0 %
      - Conning Tower: 135 tons, 0.8 %
   Machinery: 2,459 tons, 15.3 %
   Hull, fittings & equipment: 4,822 tons, 30.1 %
   Fuel, ammunition & stores: 1,542 tons, 9.6 %
   Miscellaneous weights: 265 tons, 1.7 %
      - Hull below water: 25 tons
      - Hull above water: 100 tons
      - On freeboard deck: 100 tons
      - Above deck: 40 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     22,097 lbs / 10,023 Kg = 18.4 x 13.4 " / 340 mm shells or 2.6 torpedoes
   Stability (Unstable if below 1.00): 1.33
   Metacentric height 5.8 ft / 1.8 m
   Roll period: 13.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.50
   Seaboat quality  (Average = 1.00): 1.63

Hull form characteristics:
   Hull has low quarterdeck ,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.637 / 0.641
   Length to Beam Ratio: 5.42 : 1
   'Natural speed' for length: 20.65 kts
   Power going to wave formation at top speed: 47 %
   Trim (Max stability = 0, Max steadiness = 100): 43
   Bow angle (Positive = bow angles forward): -10.00 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 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Forward deck:   30.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Aft deck:   28.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Quarter deck:   22.00 %,  9.84 ft / 3.00 m,  9.84 ft / 3.00 m
      - Average freeboard:      16.88 ft / 5.15 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 77.5 %
      - Above water (accommodation/working, high = better): 128.3 %
   Waterplane Area: 25,421 Square feet or 2,362 Square metres
   Displacement factor (Displacement / loading): 103 %
   Structure weight / hull surface area: 148 lbs/sq ft or 724 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.92
      - Longitudinal: 2.25
      - Overall: 1.00
   Excellent machinery, storage, compartmentation space
   Excellent 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 (25t)
----18t 12x350mm Torpedo (35 Pattern B)
----2t Additional Torpedo handling equipment
----5t Additional Pumps
--Above Water (100t)
----30t Flag Facilities
----30t Additional Troop Accomodations
----20t Improved Officer Accommodations
----20t Improved Crew Accomodations
----10t Construction Reserve
--On Deck (100t)
----30t Flad Gacilties
----20t Admiraltiy Accommodations
----50t Construction Reserve
--Above Deck (40t)
----20t Improved Aquisition Structures
----10t Additional Searchlights
----10t Improved Signaling Equipment

Weapons List
--340mm Patern B
--210mm Patern A
--140mm Patern B
--75mm Patern B

[snip]

An update of the Imperito class, the Triumphus represents the pinical of pre-ABG Roman Battleships.

Triumphus, Imperial Roman Republic Battleship laid down 1901

Displacement:
   14,500 t light; 15,158 t standard; 16,173 t normal; 16,985 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (433.07 ft / 426.51 ft) x 78.74 ft x (26.25 / 27.36 ft)
   (132.00 m / 130.00 m) x 24.00 m  x (8.00 / 8.34 m)

Armament:
      4 - 13.39" / 340 mm 35.0 cal guns - 1,124.36lbs / 510.00kg shells, 70 per gun
     Breech loading guns in turret on barbette mounts, 1893 Model
     2 x Twin mounts on centreline ends, evenly spread
      4 - 8.27" / 210 mm 40.0 cal guns - 270.82lbs / 122.84kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1893 Model
     4 x Single mounts on sides, evenly spread
      10 - 5.51" / 140 mm 45.0 cal guns - 79.37lbs / 36.00kg shells, 175 per gun
     Quick firing guns in casemate mounts, 1897 Model
     10 x Single mounts on sides, evenly spread
      10 hull mounts in casemates- Limited use in heavy seas
      12 - 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
     12 x Single mounts on sides, evenly spread
      6 raised mounts
      Weight of broadside 6,533 lbs / 2,963 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   11.8" / 300 mm   247.38 ft / 75.40 m   18.04 ft / 5.50 m
   Ends:   4.72" / 120 mm   179.10 ft / 54.59 m   9.84 ft / 3.00 m
   Upper:   4.72" / 120 mm   247.38 ft / 75.40 m   9.02 ft / 2.75 m
     Main Belt covers 89 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   15.0" / 380 mm   9.84" / 250 mm      15.0" / 380 mm
   2nd:   5.91" / 150 mm   3.94" / 100 mm      5.91" / 150 mm
   3rd:   3.94" / 100 mm   0.98" / 25 mm      3.94" / 100 mm
   4th:   0.59" / 15 mm         -               -

   - Armoured deck - multiple decks:
   For and Aft decks: 2.95" / 75 mm
   Forecastle: 0.98" / 25 mm  Quarter deck: 0.98" / 25 mm

   - Conning towers: Forward 9.84" / 250 mm, Aft 0.00" / 0 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 15,000 ihp / 11,190 Kw = 18.02 kts
   Range 5,500nm at 10.00 kts
   Bunker at max displacement = 1,827 tons (100% coal)

Complement:
   716 - 932

Cost:
   £1.295 million / $5.180 million

Distribution of weights at normal displacement:
   Armament: 1,047 tons, 6.5 %
      - Guns: 1,047 tons, 6.5 %
   Armour: 6,208 tons, 38.4 %
      - Belts: 3,254 tons, 20.1 %
      - Armament: 1,644 tons, 10.2 %
      - Armour Deck: 1,174 tons, 7.3 %
      - Conning Tower: 136 tons, 0.8 %
   Machinery: 2,308 tons, 14.3 %
   Hull, fittings & equipment: 4,671 tons, 28.9 %
   Fuel, ammunition & stores: 1,673 tons, 10.3 %
   Miscellaneous weights: 267 tons, 1.7 %
      - Hull below water: 27 tons
      - Hull above water: 100 tons
      - On freeboard deck: 100 tons
      - Above deck: 40 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     23,282 lbs / 10,561 Kg = 19.4 x 13.4 " / 340 mm shells or 2.8 torpedoes
   Stability (Unstable if below 1.00): 1.32
   Metacentric height 5.8 ft / 1.8 m
   Roll period: 13.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.51
   Seaboat quality  (Average = 1.00): 1.63

Hull form characteristics:
   Hull has low quarterdeck ,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.642 / 0.647
   Length to Beam Ratio: 5.42 : 1
   'Natural speed' for length: 20.65 kts
   Power going to wave formation at top speed: 47 %
   Trim (Max stability = 0, Max steadiness = 100): 43
   Bow angle (Positive = bow angles forward): -5.00 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 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Forward deck:   30.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Aft deck:   28.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Quarter deck:   22.00 %,  9.84 ft / 3.00 m,  9.84 ft / 3.00 m
      - Average freeboard:      16.88 ft / 5.15 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 74.0 %
      - Above water (accommodation/working, high = better): 128.2 %
   Waterplane Area: 25,543 Square feet or 2,373 Square metres
   Displacement factor (Displacement / loading): 104 %
   Structure weight / hull surface area: 144 lbs/sq ft or 701 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.92
      - Longitudinal: 2.26
      - Overall: 1.00
   Excellent machinery, storage, compartmentation space
   Excellent 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 (27t)
----18t 12x450mm Torpedo (45 Pattern A)
----2t Additional Torpedo handling equipment
----5t Additional Pumps
--Above Water (100t)
----30t Flag Facilities
----30t Additional Troop Accomodations
----20t Improved Officer Accommodations
----20t Improved Crew Accomodations
----10t Short-Range Wireless
--On Deck (100t)
----30t Flad Gacilties
----20t Admiraltiy Accommodations
----50t Construction Reserve
--Above Deck (40t)
----20t Improved Aquisition Structures
----10t Additional Searchlights
----10t Improved Signaling Equipment

Weapons List
--340mm Patern B
--210mm Patern A
--140mm Patern B
--75mm Patern B

[snip]

The Emperor Trajan VIII class embodies the hardness of the transition from Mix Main Battery, coal fires and VTE population. Originally intended to be an improved Triumphus class with updated guns, word of what was being built by other navies forced a change. Stretching the hull allowed accommodation of an additional turret of 340mm weapons at the expense of the 210mm guns. This did not come without sacrifices, and sticking with pure reciprocating propulsion or pure coal would have caused many issues while keeping roughly the same hull form. Major pushback from the Admiralty prevented installation of either a pure turbine power plant or a full compliment of oil-fired boilers. A compromise emerged with the mixed propulsion setup and the incorporation of oil spraying to help cut down on weight. Representing a slew of compromises and deals that left everyone displeased, the Emperor Trajan VIII class set the stage for the Imperial Navy's first Dreadnaughts in a less than satisfactory manner, which would bleed into the Invicta class.

Emperor Trajan VIII, Roman Imperial Republic Battleship laid down 1905

Displacement:
   15,500 t light; 16,446 t standard; 17,429 t normal; 18,215 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (465.88 ft / 459.32 ft) x 82.02 ft x (24.61 / 25.55 ft)
   (142.00 m / 140.00 m) x 25.00 m  x (7.50 / 7.79 m)

Armament:
      6 - 13.39" / 340 mm 40.0 cal guns - 1,157.43lbs / 525.00kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1905 Model
     3 x Twin mounts on centreline, evenly spread
      16 - 5.51" / 140 mm 50.0 cal guns - 85.98lbs / 39.00kg shells, 250 per gun
     Quick firing guns in casemate mounts, 1902 Model
     16 x Single mounts on sides, evenly spread
      8 - 2.95" / 75.0 mm 50.0 cal guns - 13.23lbs / 6.00kg shells, 350 per gun
     Quick firing guns in casemate mounts, 1902 Model
     8 x Single mounts on sides, evenly spread
      Weight of broadside 8,426 lbs / 3,822 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   11.8" / 300 mm   298.56 ft / 91.00 m   18.04 ft / 5.50 m
   Ends:   3.54" / 90 mm   160.73 ft / 48.99 m   9.84 ft / 3.00 m
   Upper:   4.72" / 120 mm   298.56 ft / 91.00 m   9.02 ft / 2.75 m
     Main Belt covers 100 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.4" / 340 mm   7.09" / 180 mm      11.0" / 280 mm
   2nd:   4.72" / 120 mm   1.97" / 50 mm      1.97" / 50 mm
   3rd:   1.97" / 50 mm   0.20" / 5 mm      0.98" / 25 mm

   - Armoured deck - multiple decks:
   For and Aft decks: 2.95" / 75 mm
   Forecastle: 0.98" / 25 mm  Quarter deck: 0.98" / 25 mm

   - Conning towers: Forward 9.84" / 250 mm, Aft 0.00" / 0 mm

Machinery:
   Coal and oil fired boilers, reciprocating cruising steam engines and steam turbines
   Direct drive, 4 shafts, 16,000 ihp / 11,936 Kw = 18.17 kts
   Range 5,500nm at 10.00 kts
   Bunker at max displacement = 1,769 tons (90% coal)

Complement:
   757 - 985

Cost:
   £1.430 million / $5.719 million

Distribution of weights at normal displacement:
   Armament: 1,349 tons, 7.7 %
      - Guns: 1,349 tons, 7.7 %
   Armour: 6,781 tons, 38.9 %
      - Belts: 3,643 tons, 20.9 %
      - Armament: 1,595 tons, 9.2 %
      - Armour Deck: 1,400 tons, 8.0 %
      - Conning Tower: 143 tons, 0.8 %
   Machinery: 1,676 tons, 9.6 %
   Hull, fittings & equipment: 5,437 tons, 31.2 %
   Fuel, ammunition & stores: 1,929 tons, 11.1 %
   Miscellaneous weights: 257 tons, 1.5 %
      - Hull below water: 27 tons
      - Hull above water: 100 tons
      - On freeboard deck: 90 tons
      - Above deck: 40 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     29,921 lbs / 13,572 Kg = 24.9 x 13.4 " / 340 mm shells or 3.3 torpedoes
   Stability (Unstable if below 1.00): 1.39
   Metacentric height 6.6 ft / 2.0 m
   Roll period: 13.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.58
   Seaboat quality  (Average = 1.00): 1.94

Hull form characteristics:
   Hull has low quarterdeck ,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.658 / 0.662
   Length to Beam Ratio: 5.60 : 1
   'Natural speed' for length: 21.43 kts
   Power going to wave formation at top speed: 45 %
   Trim (Max stability = 0, Max steadiness = 100): 36
   Bow angle (Positive = bow angles forward): 5.00 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 %,  21.33 ft / 6.50 m,  20.51 ft / 6.25 m
      - Forward deck:   30.00 %,  20.51 ft / 6.25 m,  20.51 ft / 6.25 m
      - Aft deck:   35.00 %,  20.51 ft / 6.25 m,  20.51 ft / 6.25 m
      - Quarter deck:   15.00 %,  11.48 ft / 3.50 m,  11.48 ft / 3.50 m
      - Average freeboard:      19.22 ft / 5.86 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 67.6 %
      - Above water (accommodation/working, high = better): 150.0 %
   Waterplane Area: 29,067 Square feet or 2,700 Square metres
   Displacement factor (Displacement / loading): 105 %
   Structure weight / hull surface area: 148 lbs/sq ft or 724 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.91
      - Longitudinal: 2.22
      - Overall: 1.00
   Excellent machinery, storage, compartmentation space
   Excellent 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 (27t)
----18t 12x450mm Torpedo (45 Pattern B)
----2t Additional Torpedo handling equipment
----5t Additional Pumps
--Above Water (100t)
----30t Flag Facilities
----30t Additional Troop Accommodations
----20t Improved Officer Accommodations
----20t Improved Crew Accommodations
----10t Short-Range Wireless
--On Deck (90t)
----30t Flag Facilities
----20t Admiralty Accommodations
----25t Long-Range Wireless
----15t Construction Reserve
--Above Deck (40t)
----20t Improved Aquisition Structures
----10t Additional Searchlights
----10t Improved Signaling Equipment

Weapons List
--340mm Patern C
--140mm Patern C
--75mm Patern B

[snip]

The Invicta class are the first true All-Big-Gun battleships of the Roman Navy. The first ships to be equipped with a primitive centralized fire control system, they were also the first fully turbine equipped capital ship in the Imperial Navy. These turbines were also the first not to be directly connected to a propellor shaft, with an Electric Drive acting as an intermediary. An early Torpedo Defence System was also incorporated into the class.

Invicta, Imperial Roman Republic Battleship laid down 1907

Displacement:
   20,500 t light; 21,678 t standard; 22,962 t normal; 23,989 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (541.34 ft / 541.34 ft) x 88.58 ft x (26.25 / 27.24 ft)
   (165.00 m / 165.00 m) x 27.00 m  x (8.00 / 8.30 m)

Armament:
      8 - 13.39" / 340 mm 40.0 cal guns - 1,157.43lbs / 525.00kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1905 Model
     4 x Twin mounts on centreline, evenly spread
      16 - 5.51" / 140 mm 50.0 cal guns - 85.98lbs / 39.00kg shells, 250 per gun
     Quick firing guns in casemate mounts, 1902 Model
     16 x Single mounts on sides, evenly spread
      16 hull mounts in casemates- Limited use in heavy seas
      4 - 2.95" / 75.0 mm 50.0 cal guns - 13.23lbs / 6.00kg shells, 450 per gun
     Quick firing guns in casemate mounts, 1902 Model
     4 x Single mounts on side ends, evenly spread
      4 hull mounts in casemates- Limited use in heavy seas
      Weight of broadside 10,688 lbs / 4,848 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.6" / 320 mm   351.87 ft / 107.25 m   18.04 ft / 5.50 m
   Ends:   3.94" / 100 mm   189.44 ft / 57.74 m   9.84 ft / 3.00 m
   Upper:   4.72" / 120 mm   351.87 ft / 107.25 m   9.02 ft / 2.75 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      0.59" / 15 mm   351.87 ft / 107.25 m   26.25 ft / 8.00 m
   Beam between torpedo bulkheads 75.46 ft / 23.00 m

   - Hull void:
      0.39" / 10 mm   360.89 ft / 110.00 m   26.25 ft / 8.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.4" / 340 mm   7.09" / 180 mm      11.0" / 280 mm
   2nd:   3.94" / 100 mm   0.98" / 25 mm      1.97" / 50 mm

   - Armoured deck - multiple decks:
   For and Aft decks: 3.54" / 90 mm
   Forecastle: 0.59" / 15 mm  Quarter deck: 0.59" / 15 mm

   - Conning towers: Forward 9.84" / 250 mm, Aft 0.00" / 0 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 32,000 shp / 23,872 Kw = 21.17 kts
   Range 5,500nm at 10.00 kts
   Bunker at max displacement = 2,311 tons (90% coal)

Complement:
   932 - 1,212

Cost:
   £1.835 million / $7.339 million

Distribution of weights at normal displacement:
   Armament: 1,690 tons, 7.4 %
      - Guns: 1,690 tons, 7.4 %
   Armour: 8,874 tons, 38.6 %
      - Belts: 4,466 tons, 19.4 %
      - Torpedo bulkhead: 202 tons, 0.9 %
      - Void: 138 tons, 0.6 %
      - Armament: 1,869 tons, 8.1 %
      - Armour Deck: 2,028 tons, 8.8 %
      - Conning Tower: 171 tons, 0.7 %
   Machinery: 1,980 tons, 8.6 %
   Hull, fittings & equipment: 7,004 tons, 30.5 %
   Fuel, ammunition & stores: 2,462 tons, 10.7 %
   Miscellaneous weights: 952 tons, 4.1 %
      - Hull below water: 522 tons
      - Hull above water: 100 tons
      - On freeboard deck: 290 tons
      - Above deck: 40 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     37,130 lbs / 16,842 Kg = 31.0 x 13.4 " / 340 mm shells or 5.5 torpedoes
   Stability (Unstable if below 1.00): 1.31
   Metacentric height 6.7 ft / 2.0 m
   Roll period: 14.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 72 %
         - Recoil effect (Restricted arc if above 1.00): 0.53
   Seaboat quality  (Average = 1.00): 1.43

Hull form characteristics:
   Hull has low quarterdeck ,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.639 / 0.643
   Length to Beam Ratio: 6.11 : 1
   'Natural speed' for length: 23.27 kts
   Power going to wave formation at top speed: 47 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   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 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Forward deck:   30.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Aft deck:   35.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Quarter deck:   15.00 %,  9.84 ft / 3.00 m,  9.84 ft / 3.00 m
      - Average freeboard:      17.51 ft / 5.34 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 76.9 %
      - Above water (accommodation/working, high = better): 140.2 %
   Waterplane Area: 36,365 Square feet or 3,378 Square metres
   Displacement factor (Displacement / loading): 105 %
   Structure weight / hull surface area: 157 lbs/sq ft or 764 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.54
      - Overall: 1.00
   Excellent 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 (522t)
----495t Electric Drives
----18t 12x450mm Torpedo (45 Pattern B)
----2t Additional Torpedo handling equipment
----5t Additional Pumps
--Above Water (100t)
----30t Flag Facilities
----30t Improved Officer Accommodations
----30t Improved Crew Accommodations
----10t Short-Range Wireless
----10t Construction Reserve
--On Deck (290t)
----190t 1906 Fire Control
----30t Flag Facilities
----20t Admiralty Accommodations
----25t Long-Range Wireless
----15t Construction Reserve
--Above Deck (40t)
----20t Improved Aquisition Structures
----10t Additional Searchlights
----10t Improved Signaling Equipment

Weapons List
--340mm Patern C
--140mm Patern C
--75mm Patern B

[snip]

While still under construction in 1910, the Praeventores class are the most powerful battleships yet constructed for the Imperial Navy. Building off of the Invicta class, they mount four more 340mm guns and have a stronger TDS.

Praeventores, Imperial Roman Republic Battleship laid down 1909

Displacement:
   25,500 t light; 27,090 t standard; 28,132 t normal; 28,966 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (633.20 ft / 623.36 ft) x 88.58 ft x (26.25 / 26.92 ft)
   (193.00 m / 190.00 m) x 27.00 m  x (8.00 / 8.20 m)

Armament:
      12 - 13.39" / 340 mm 45.0 cal guns - 1,212.54lbs / 550.00kg shells, 110 per gun
     Breech loading guns in turret on barbette mounts, 1909 Model
     4 x 3-gun mounts on centreline, evenly spread
      16 - 5.51" / 140 mm 55.0 cal guns - 85.98lbs / 39.00kg shells, 175 per gun
     Quick firing guns in casemate mounts, 1909 Model
     16 x Single mounts on sides, evenly spread
      16 hull mounts in casemates- Limited use in heavy seas
      4 - 2.95" / 75.0 mm 50.0 cal guns - 13.23lbs / 6.00kg shells, 150 per gun
     Quick firing guns in casemate mounts, 1902 Model
     4 x Single mounts on side ends, evenly spread
      4 hull mounts in casemates- Limited use in heavy seas
      Weight of broadside 15,979 lbs / 7,248 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.6" / 320 mm   405.18 ft / 123.50 m   18.04 ft / 5.50 m
   Ends:   3.94" / 100 mm   218.14 ft / 66.49 m   9.84 ft / 3.00 m
   Upper:   3.94" / 100 mm   405.18 ft / 123.50 m   9.02 ft / 2.75 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.57" / 40 mm   405.18 ft / 123.50 m   26.25 ft / 8.00 m
   Beam between torpedo bulkheads 78.74 ft / 24.00 m

   - Hull void:
      0.39" / 10 mm   405.18 ft / 123.50 m   18.04 ft / 5.50 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.4" / 340 mm   7.09" / 180 mm      11.0" / 280 mm
   2nd:   3.94" / 100 mm   0.98" / 25 mm      1.97" / 50 mm

   - Armoured deck - multiple decks:
   For and Aft decks: 3.94" / 100 mm
   Forecastle: 0.98" / 25 mm  Quarter deck: 0.98" / 25 mm

   - Conning towers: Forward 9.84" / 250 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 36,000 shp / 26,856 Kw = 21.35 kts
   Range 5,500nm at 10.00 kts
   Bunker at max displacement = 1,876 tons

Complement:
   1,085 - 1,411

Cost:
   £2.562 million / $10.249 million

Distribution of weights at normal displacement:
   Armament: 3,379 tons, 12.0 %
      - Guns: 3,379 tons, 12.0 %
   Armour: 11,021 tons, 39.2 %
      - Belts: 4,942 tons, 17.6 %
      - Torpedo bulkhead: 620 tons, 2.2 %
      - Void: 107 tons, 0.4 %
      - Armament: 2,417 tons, 8.6 %
      - Armour Deck: 2,739 tons, 9.7 %
      - Conning Tower: 196 tons, 0.7 %
   Machinery: 1,636 tons, 5.8 %
   Hull, fittings & equipment: 8,448 tons, 30.0 %
   Fuel, ammunition & stores: 2,632 tons, 9.4 %
   Miscellaneous weights: 1,015 tons, 3.6 %
      - Hull below water: 437 tons
      - Hull above water: 100 tons
      - On freeboard deck: 438 tons
      - Above deck: 40 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     40,836 lbs / 18,523 Kg = 34.1 x 13.4 " / 340 mm shells or 6.3 torpedoes
   Stability (Unstable if below 1.00): 1.17
   Metacentric height 5.6 ft / 1.7 m
   Roll period: 15.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.83
   Seaboat quality  (Average = 1.00): 1.34

Hull form characteristics:
   Hull has low quarterdeck ,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.679 / 0.682
   Length to Beam Ratio: 7.04 : 1
   'Natural speed' for length: 24.97 kts
   Power going to wave formation at top speed: 43 %
   Trim (Max stability = 0, Max steadiness = 100): 52
   Bow angle (Positive = bow angles forward): 10.00 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 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Forward deck:   30.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Aft deck:   35.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Quarter deck:   15.00 %,  9.84 ft / 3.00 m,  9.84 ft / 3.00 m
      - Average freeboard:      17.51 ft / 5.34 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 76.6 %
      - Above water (accommodation/working, high = better): 143.9 %
   Waterplane Area: 43,447 Square feet or 4,036 Square metres
   Displacement factor (Displacement / loading): 97 %
   Structure weight / hull surface area: 173 lbs/sq ft or 847 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.21
      - Overall: 1.00
   Excellent 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 (522t)
----410t Electric Drives
----18t 12x450mm Torpedo (45 Pattern C)
----2t Additional Torpedo handling equipment
----5t Additional Pumps
--Above Water (100t)
----30t Flag Facilities
----30t Improved Officer Accommodations
----30t Improved Crew Accommodations
----10t Short-Range Wireless
----10t Construction Reserve
--On Deck (438t)
----338t 1906 Fire Control
----40t Flag Facilities
----20t Admiralty Accommodations
----25t Long-Range Wireless
----15t Construction Reserve
--Above Deck (40t)
----20t Improved Aquisition Structures
----10t Additional Searchlights
----10t Improved Signaling Equipment

Weapons List
--340mm Patern D
--140mm Patern D
--75mm Patern C

[Kaiser Kirk]

I notice your ships have rather thick single armor decks, leaving your upper decks unprotected.
Further, at this stage you seem to be devoting a rather large amount of armor to them.
I'd suggest swapping to multiple armor decks, or slimming the armor and using the weight elsewhere.

Why ?
Looking at Navweaps, it's hard to find deck penetration numbers for weapons in this time frame, which makes sense since they were negligible.

I've made a range of guns using Logi's ballistics tool, using Navweaps data to set the ballistics table.
Shorter/earlier guns have a bit of an advantage as their 2-4crh noses cause the shot to fall sooner, but with the 345L40 firing a 545kg shell at 805mps , deck pen is only 60mm at 14,000 yards - which is 40% range than our best current technology.
The 1909 345L45 firing a 573kg shot at 831m/s only penetrates 58mm at 14,000 yards.

You'll note that in my designs, I provide at least 50-65mm as proof against the largest splinters, so 60-70mm decks do make sense, but 75-100 single decks look like a waste. 

Even if one looks at even the British 15"/42 with big heavy but higher crh Greenboys that carry farther, (hmm, don't want to format the table) from Nav Weaps, they aren't getting through 75-100mm until 24,000+ yards.

Armor Penetration with 1,938 lbs. (879 kg) APC Shell
Range   Side Armor   Deck Armor
17,200 yards (15,730 m)   14.0" (356 mm)   ---
18,000 yards (16,460 m)   ---   2.0" (51 mm)
19,400 yards (17,740 m)   13.0" (330 mm)   ---
21,700 yards (19,840 m)   12.0" (305 mm)   ---
24,000 yards (21,950 m)   ---   3.0" (76 mm)
24,500 yards (22,400 m)   11.0" (279 mm)   ---
28,000 yards (25,600 m)   10.0" (254 mm)   4.0" (102 mm)
29,500 yards (26,970 m)   ---   5.0" (127 mm)
32,500 yards (29,720 m)   ---   6.0" (152 mm)
This data is from "British Battleships of World War Two."

[snip]

I will tinker with the deck armor a bit, but probably just move the last three to Multiple decks rather than single.

EDIT: The Emperor Trajan VIII, Invicta, and Praeventores classes all now have Multiple Armored Decks rather than a single deck.

[snip]

The oldest of the Imperial Navy's armored cruisers, Pegasum is somewhat conventional. While hopelessly obsolete in 1910, there are still roles she can fill.

Pegasum, Imperial Roman Republic Armored Cruiser laid down 1893

Displacement:
   9,600 t light; 9,982 t standard; 10,993 t normal; 11,802 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (475.72 ft / 475.72 ft) x 63.98 ft x (26.25 / 27.67 ft)
   (145.00 m / 145.00 m) x 19.50 m  x (8.00 / 8.43 m)

Armament:
      2 - 8.27" / 210 mm 40.0 cal guns - 242.51lbs / 110.00kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1893 Model
     2 x Single mounts on centreline ends, evenly spread
      14 - 5.51" / 140 mm 45.0 cal guns - 79.37lbs / 36.00kg shells, 175 per gun
     Breech loading guns in casemate mounts, 1890 Model
     8 x Single mounts on sides, evenly spread
     6 x Single mounts on sides, forward evenly spread
      6 hull mounts in casemates- Limited use in heavy seas
      8 - 2.95" / 75.0 mm 45.0 cal guns - 13.23lbs / 6.00kg shells, 450 per gun
     Breech loading guns in deck mounts, 1890 Model
     6 x Single mounts on sides, evenly spread
      6 raised mounts
     2 x Single mounts on centreline ends, evenly spread
      2 raised mounts
      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 side ends, evenly spread
      Weight of broadside 1,713 lbs / 777 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   5.91" / 150 mm   378.28 ft / 115.30 m   9.61 ft / 2.93 m
   Ends:   1.97" / 50 mm     97.41 ft / 29.69 m   9.61 ft / 2.93 m
   Upper:   3.94" / 100 mm   378.28 ft / 115.30 m   8.01 ft / 2.44 m
     Main Belt covers 122 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.91" / 150 mm   3.94" / 100 mm      5.91" / 150 mm
   2nd:   3.94" / 100 mm   0.98" / 25 mm      3.94" / 100 mm
   3rd:   0.59" / 15 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 1.18" / 30 mm
   Forecastle: 0.59" / 15 mm  Quarter deck: 0.59" / 15 mm

   - Conning towers: Forward 5.91" / 150 mm, Aft 3.94" / 100 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 3 shafts, 20,000 ihp / 14,920 Kw = 21.28 kts
   Range 6,000nm at 10.00 kts
   Bunker at max displacement = 1,819 tons (100% coal)

Complement:
   536 - 697

Cost:
   £0.971 million / $3.885 million

Distribution of weights at normal displacement:
   Armament: 332 tons, 3.0 %
      - Guns: 332 tons, 3.0 %
   Armour: 2,253 tons, 20.5 %
      - Belts: 1,425 tons, 13.0 %
      - Armament: 303 tons, 2.8 %
      - Armour Deck: 420 tons, 3.8 %
      - Conning Towers: 105 tons, 1.0 %
   Machinery: 3,774 tons, 34.3 %
   Hull, fittings & equipment: 3,052 tons, 27.8 %
   Fuel, ammunition & stores: 1,393 tons, 12.7 %
   Miscellaneous weights: 190 tons, 1.7 %
      - Hull below water: 20 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):
     8,469 lbs / 3,842 Kg = 30.0 x 8.3 " / 210 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.53
   Metacentric height 5.3 ft / 1.6 m
   Roll period: 11.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.16
   Seaboat quality  (Average = 1.00): 1.78

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.482 / 0.491
   Length to Beam Ratio: 7.44 : 1
   'Natural speed' for length: 21.81 kts
   Power going to wave formation at top speed: 44 %
   Trim (Max stability = 0, Max steadiness = 100): 39
   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:   10.24 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Forward deck:   60.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Aft deck:   19.52 %,  9.84 ft / 3.00 m,  9.84 ft / 3.00 m
      - Quarter deck:   10.24 %,  9.84 ft / 3.00 m,  9.84 ft / 3.00 m
      - Average freeboard:      16.18 ft / 4.93 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 122.3 %
      - Above water (accommodation/working, high = better): 118.0 %
   Waterplane Area: 19,946 Square feet or 1,853 Square metres
   Displacement factor (Displacement / loading): 100 %
   Structure weight / hull surface area: 102 lbs/sq ft or 500 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.76
      - 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 A)
----2t Additional Torpedo Handing Equipment
--Above Water (100t)
----30t Flag Facilities
----30t Improved Officer Accommodations
----30t Improved Crew Accommodations
----20t Construction Reserve
--On Deck (50t)
----30t Flag Facilities
----10t Admiralty Accommodations
----10t Construction Reserve
--Above Deck (20t)
----10t Improved Aquisition Structures
----5t Additional Searchlights
----5t Improved Signaling Equipment

Weapons List
--210mm Patern A
--140mm Patern A
--75mm Patern A
--45mm Patern A

[snip]

Designed as fast, heavy scouts for the fleet, the Excursor class proved to be the right ship at the wrong time. Not possessing the turn of speed to chase down smaller cruisers only a few years their junior while being unable to go toe-to-toe with larger cruisers, they did have usefulness in demonstrating the things a heavy scout needed by not providing fully for them.

Excursor, Imperial Roman Republic Armored Cruiser laid down 1899

Displacement:
   8,000 t light; 8,323 t standard; 9,138 t normal; 9,790 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (465.88 ft / 459.32 ft) x 63.98 ft x (24.61 / 25.83 ft)
   (142.00 m / 140.00 m) x 19.50 m  x (7.50 / 7.87 m)

Armament:
      2 - 8.27" / 210 mm 40.0 cal guns - 242.51lbs / 110.00kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1893 Model
     2 x Single mounts on centreline ends, evenly spread
      12 - 5.51" / 140 mm 45.0 cal guns - 79.37lbs / 36.00kg shells, 175 per gun
     Quick firing guns in casemate mounts, 1897 Model
     12 x Single mounts on sides, evenly spread
      8 - 2.95" / 75.0 mm 45.0 cal guns - 13.23lbs / 6.00kg shells, 350 per gun
     Quick firing guns in deck mounts, 1897 Model
     8 x Single mounts on sides, evenly spread
      8 raised mounts
      Weight of broadside 1,543 lbs / 700 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.54" / 90 mm   459.32 ft / 140.00 m   9.84 ft / 3.00 m
   Upper:   0.79" / 20 mm   423.75 ft / 129.16 m   9.02 ft / 2.75 m
     Main Belt covers 154 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.91" / 150 mm   3.94" / 100 mm      5.91" / 150 mm
   2nd:   1.97" / 50 mm   0.98" / 25 mm      3.94" / 100 mm
   3rd:   0.59" / 15 mm         -               -

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

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

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 3 shafts, 25,000 ihp / 18,650 Kw = 23.23 kts
   Range 6,000nm at 10.00 kts
   Bunker at max displacement = 1,467 tons (100% coal)

Complement:
   466 - 607

Cost:
   £0.934 million / $3.736 million

Distribution of weights at normal displacement:
   Armament: 329 tons, 3.6 %
      - Guns: 329 tons, 3.6 %
   Armour: 1,180 tons, 12.9 %
      - Belts: 711 tons, 7.8 %
      - Armament: 235 tons, 2.6 %
      - Armour Deck: 197 tons, 2.2 %
      - Conning Tower: 37 tons, 0.4 %
   Machinery: 3,968 tons, 43.4 %
   Hull, fittings & equipment: 2,413 tons, 26.4 %
   Fuel, ammunition & stores: 1,138 tons, 12.5 %
   Miscellaneous weights: 110 tons, 1.2 %
      - Hull below water: 20 tons
      - Hull above water: 20 tons
      - On freeboard deck: 45 tons
      - Above deck: 25 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     4,554 lbs / 2,066 Kg = 16.1 x 8.3 " / 210 mm shells or 0.9 torpedoes
   Stability (Unstable if below 1.00): 1.69
   Metacentric height 6.1 ft / 1.9 m
   Roll period: 10.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.12
   Seaboat quality  (Average = 1.00): 1.38

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.442 / 0.451
   Length to Beam Ratio: 7.18 : 1
   'Natural speed' for length: 21.43 kts
   Power going to wave formation at top speed: 49 %
   Trim (Max stability = 0, Max steadiness = 100): 51
   Bow angle (Positive = bow angles forward): -20.00 degrees
   Stern overhang: -6.56 ft / -2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   10.00 %,  13.12 ft / 4.00 m,  13.12 ft / 4.00 m
      - Forward deck:   50.00 %,  13.12 ft / 4.00 m,  13.12 ft / 4.00 m
      - Aft deck:   25.00 %,  13.12 ft / 4.00 m,  13.12 ft / 4.00 m
      - Quarter deck:   15.00 %,  13.12 ft / 4.00 m,  13.12 ft / 4.00 m
      - Average freeboard:      13.12 ft / 4.00 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 151.5 %
      - Above water (accommodation/working, high = better): 99.9 %
   Waterplane Area: 18,629 Square feet or 1,731 Square metres
   Displacement factor (Displacement / loading): 90 %
   Structure weight / hull surface area: 93 lbs/sq ft or 456 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.53
      - Overall: 1.00
   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 (20t)
----18t 12x350mm Torpedos (35 Pattern B)
----2t Additional Torpedo Handing Equipment
--Above Water (20t)
----10t Flag Facilities
----5t Improved Officer Accommodations
----5t Improved Crew Accommodations
--On Deck (45t)
----30t Flag Facilities
----10t Admiralty Accommodations
----5t Construction Reserve
--Above Deck (25t)
----15t Improved Aquisition Structures
----5t Additional Searchlights
----5t Improved Signaling Equipment

Weapons List
--210mm Patern A
--140mm Patern B
--75mm Patern B

[snip]

The last pre-ABG (and last armored cruiser prior to 1910) Armored Cruiser, the Argonauta was almost immediately overshadowed by the new concept of Battlecruisers.

Argonauta, Imperial Roman Republic Armored Cruiser laid down 1905

Displacement:
   15,000 t light; 15,627 t standard; 16,834 t normal; 17,799 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (524.93 ft / 524.93 ft) x 80.38 ft x (26.25 / 27.41 ft)
   (160.00 m / 160.00 m) x 24.50 m  x (8.00 / 8.36 m)

Armament:
      12 - 8.27" / 210 mm 45.0 cal guns - 242.51lbs / 110.00kg shells, 110 per gun
     Breech loading guns in turret on barbette mounts, 1905 Model
     2 x Twin mounts on centreline ends, evenly spread
     4 x Twin mounts on sides, evenly spread
      10 - 5.51" / 140 mm 50.0 cal guns - 85.98lbs / 39.00kg shells, 175 per gun
     Quick firing guns in casemate mounts, 1902 Model
     10 x Single mounts on sides, evenly spread
      10 hull mounts in casemates- Limited use in heavy seas
      16 - 2.95" / 75.0 mm 50.0 cal guns - 13.23lbs / 6.00kg shells, 250 per gun
     Quick firing guns in deck mounts, 1902 Model
     16 x Single mounts on sides, evenly spread
      16 raised mounts
      Weight of broadside 3,982 lbs / 1,806 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   7.09" / 180 mm   370.60 ft / 112.96 m   18.04 ft / 5.50 m
   Ends:   2.76" / 70 mm   154.30 ft / 47.03 m   9.84 ft / 3.00 m
   Upper:   3.94" / 100 mm   370.60 ft / 112.96 m   9.02 ft / 2.75 m
     Main Belt covers 109 % of normal length

   - Hull void:
      0.59" / 15 mm   369.29 ft / 112.56 m   18.04 ft / 5.50 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   7.09" / 180 mm   4.33" / 110 mm      7.09" / 180 mm
   2nd:   3.94" / 100 mm   0.98" / 25 mm      3.94" / 100 mm
   3rd:   0.59" / 15 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 1.18" / 30 mm
   Forecastle: 0.39" / 10 mm  Quarter deck: 0.39" / 10 mm

   - Conning towers: Forward 7.87" / 200 mm, Aft 0.00" / 0 mm

Machinery:
   Coal and oil fired boilers, reciprocating cruising steam engines and steam turbines
   Direct drive, 3 shafts, 43,000 ihp / 32,078 Kw = 24.24 kts
   Range 7,000nm at 10.00 kts
   Bunker at max displacement = 2,172 tons (90% coal)

Complement:
   738 - 960

Cost:
   £1.535 million / $6.141 million

Distribution of weights at normal displacement:
   Armament: 981 tons, 5.8 %
      - Guns: 981 tons, 5.8 %
   Armour: 4,595 tons, 27.3 %
      - Belts: 2,726 tons, 16.2 %
      - Void: 146 tons, 0.9 %
      - Armament: 1,038 tons, 6.2 %
      - Armour Deck: 574 tons, 3.4 %
      - Conning Tower: 111 tons, 0.7 %
   Machinery: 4,505 tons, 26.8 %
   Hull, fittings & equipment: 4,619 tons, 27.4 %
   Fuel, ammunition & stores: 1,834 tons, 10.9 %
   Miscellaneous weights: 300 tons, 1.8 %
      - Hull below water: 25 tons
      - Hull above water: 125 tons
      - On freeboard deck: 125 tons
      - Above deck: 25 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     15,881 lbs / 7,204 Kg = 56.2 x 8.3 " / 210 mm shells or 1.8 torpedoes
   Stability (Unstable if below 1.00): 1.34
   Metacentric height 6.0 ft / 1.8 m
   Roll period: 13.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.28
   Seaboat quality  (Average = 1.00): 1.29

Hull form characteristics:
   Hull has low quarterdeck ,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.532 / 0.539
   Length to Beam Ratio: 6.53 : 1
   'Natural speed' for length: 22.91 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 55
   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:   14.70 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Forward deck:   39.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Aft deck:   31.60 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Quarter deck:   14.70 %,  9.84 ft / 3.00 m,  9.84 ft / 3.00 m
      - Average freeboard:      17.54 ft / 5.35 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 108.6 %
      - Above water (accommodation/working, high = better): 141.0 %
   Waterplane Area: 28,956 Square feet or 2,690 Square metres
   Displacement factor (Displacement / loading): 96 %
   Structure weight / hull surface area: 124 lbs/sq ft or 604 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.53
      - Overall: 1.00
   Adequate 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 (25t)
----20t 12x450mm Torpedos (45 Pattern A)
----2t Additional Torpedo Handing Equipment
----3t Additional Pumps
--Above Water (125t)
----40t Flag Facilities
----20t Improved Officer Accommodations
----20t Improved Crew Accommodations
----30t Additional Troop Compliment
----10t Short Range Wireless
----5t Construction Reserve
--On Deck (125t)
----40t Flag Facilities
----20t Admiralty Accommodations
----15t Additional Ventalation
----10t Improved Officer Acomidations
----15t Improved Crew Acomidations
----25t Long-Range Wireless
--Above Deck (25t)
----15t Improved Aquisition Structures
----5t Additional Searchlights
----5t Improved Signaling Equipment

Weapons List
--210mm Patern B
--140mm Patern C
--75mm Patern C

[snip]

Quick Changelog:

--Because I am a derp, I forgot to include Wireless in my Misc weight allocations. All ships laid down 1900 or later now have weight allocated to one or more wireless sets. Pre-1900 ships may get a refit with them, but I will post that separately later if they are.
--Fixed the Argonauta not having the correct shell weight for the 210mm guns.

[snip]

The Ariminum Class Cruisers represent the earliest version of the "Hexagon" Cruisers referred to for their armament layout. The most numerous single example of the type, the Ariminum's are also the oldest and are slowing being removed from frontline duties.

Ariminum, Imperial Roman Republic Cruiser laid down 1890

Displacement:
   3,500 t light; 3,628 t standard; 4,009 t normal; 4,314 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (311.68 ft / 308.40 ft) x 42.65 ft x (20.51 / 21.70 ft)
   (95.00 m / 94.00 m) x 13.00 m  x (6.25 / 6.61 m)

Armament:
      6 - 5.51" / 140 mm 45.0 cal guns - 79.37lbs / 36.00kg shells, 125 per gun
     Breech loading guns in deck mounts, 1890 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
     Breech loading guns in deck mounts, 1890 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   295.51 ft / 90.07 m   7.84 ft / 2.39 m
   Ends:   0.39" / 10 mm     12.86 ft / 3.92 m   7.84 ft / 2.39 m
     Main Belt covers 147 % 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 5.91" / 150 mm, Aft 3.94" / 100 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   No drive to shaft, 2 shafts, 9,000 ihp / 6,714 Kw = 19.51 kts
   Range 4,000nm at 10.00 kts
   Bunker at max displacement = 686 tons (100% coal)

Complement:
   251 - 327

Cost:
   £0.392 million / $1.569 million

Distribution of weights at normal displacement:
   Armament: 94 tons, 2.3 %
      - Guns: 94 tons, 2.3 %
   Armour: 430 tons, 10.7 %
      - Belts: 72 tons, 1.8 %
      - Armament: 42 tons, 1.0 %
      - Armour Deck: 262 tons, 6.5 %
      - Conning Towers: 54 tons, 1.3 %
   Machinery: 1,718 tons, 42.9 %
   Hull, fittings & equipment: 1,098 tons, 27.4 %
   Fuel, ammunition & stores: 509 tons, 12.7 %
   Miscellaneous weights: 160 tons, 4.0 %
      - Hull below water: 20 tons
      - Hull above water: 70 tons
      - On freeboard deck: 60 tons
      - Above deck: 10 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,242 lbs / 1,017 Kg = 26.8 x 5.5 " / 140 mm shells or 0.6 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): 2.00

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.520 / 0.529
   Length to Beam Ratio: 7.23 : 1
   'Natural speed' for length: 17.56 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 35
   Bow angle (Positive = bow angles forward): -30.00 degrees
   Stern overhang: -8.20 ft / -2.50 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   2.09 %,  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:   65.82 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Quarter deck:   2.09 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Average freeboard:      15.58 ft / 4.75 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 148.5 %
      - Above water (accommodation/working, high = better): 105.6 %
   Waterplane Area: 8,928 Square feet or 829 Square metres
   Displacement factor (Displacement / loading): 92 %
   Structure weight / hull surface area: 70 lbs/sq ft or 341 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.87
      - Longitudinal: 3.28
      - 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 A)
----2t Additional Torpedo Handing Equipment
--Above Water (70t)
----10t Improved Officer Accommodations
----10t Improved Crew Accommodations
----20t Additional Troop Compliment
----5t 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