Byzantine Empire 1910-1917

[Jefgte]

...Simply, the update of the D8 class with 120mm guns.

D9, Byzantine Empire Long Range Destroyer laid down 1916

Displacement:
   1 060 t light; 1 101 t standard; 1 217 t normal; 1 310 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (347,77 ft / 347,77 ft) x 35,43 ft x (8,86 / 9,30 ft)
   (106,00 m / 106,00 m) x 10,80 m  x (2,70 / 2,83 m)

Armament:
      4 - 4,72" / 120 mm 45,0 cal guns - 53,03lbs / 24,05kg shells, 130 per gun
     Quick firing guns in deck mounts, 1916 Model
     4 x Single mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      1 - 3,00" / 76,2 mm 45,0 cal gun - 13,62lbs / 6,18kg shells, 150 per gun
      Anti-air gun in deck mount, 1916 Model
     1 x Single mount on centreline, forward deck aft
      1 raised mount
      2 - 0,30" / 7,7 mm 90,0 cal guns - 0,02lbs / 0,01kg shells, 2 000 per gun
     Machine guns in deck mounts, 1916 Model
     2 x Single mounts on sides, forward deck forward
      Weight of broadside 226 lbs / 102 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,39" / 10 mm         -               -
   2nd:   0,39" / 10 mm         -               -
   4th:   0,39" / 10 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 21 000 shp / 15 666 Kw = 30,01 kts
   Range 6 000nm at 10,00 kts
   Bunker at max displacement = 209 tons

Complement:
   102 - 133

Cost:
   £0,214 million / $0,855 million

Distribution of weights at normal displacement:
   Armament: 40 tons, 3,3 %
      - Guns: 40 tons, 3,3 %
   Armour: 7 tons, 0,6 %
      - Armament: 7 tons, 0,6 %
   Machinery: 591 tons, 48,5 %
   Hull, fittings & equipment: 333 tons, 27,4 %
   Fuel, ammunition & stores: 157 tons, 12,9 %
   Miscellaneous weights: 89 tons, 7,3 %
      - On freeboard deck: 60 tons
      - Above deck: 29 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     421 lbs / 191 Kg = 8,0 x 4,7 " / 120 mm shells or 0,3 torpedoes
   Stability (Unstable if below 1.00): 1,22
   Metacentric height 1,5 ft / 0,5 m
   Roll period: 12,0 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0,23
   Seaboat quality  (Average = 1.00): 1,03

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0,390 / 0,400
   Length to Beam Ratio: 9,81 : 1
   'Natural speed' for length: 18,65 kts
   Power going to wave formation at top speed: 61 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   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:   17,50 %,  18,04 ft / 5,50 m,  14,44 ft / 4,40 m
      - Forward deck:   32,50 %,  14,44 ft / 4,40 m,  11,81 ft / 3,60 m
      - Aft deck:   32,50 %,  11,81 ft / 3,60 m,  11,81 ft / 3,60 m
      - Quarter deck:   17,50 %,  11,81 ft / 3,60 m,  12,47 ft / 3,80 m
      - Average freeboard:      13,01 ft / 3,96 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 165,7 %
      - Above water (accommodation/working, high = better): 175,4 %
   Waterplane Area: 7 534 Square feet or 700 Square metres
   Displacement factor (Displacement / loading): 69 %
   Structure weight / hull surface area: 29 lbs/sq ft or 143 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,50
      - Longitudinal: 1,08
      - Overall: 0,54
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

32t for 8TT x 533
4t for 1913 top mast rangefinder
25t for LR marconi
6t for additionnal engines ventillation
22t reserved for Troops, Materials, DC, Minen...

[Jefgte]

Update T400- Red Sea class
2x3" => 2x4"+1x3"AA
28.5Kts=> 28kts
2800nm=> 3000nm

=> A more powerfull TB

Red Sea Class, Byzantine Empire T400 laid down 1916

Displacement:
   400 t light; 416 t standard; 448 t normal; 473 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (242,78 ft / 242,78 ft) x 24,28 ft x (6,64 / 6,89 ft)
   (74,00 m / 74,00 m) x 7,40 m  x (2,03 / 2,10 m)

Armament:
      2 - 4,00" / 102 mm 45,0 cal guns - 32,27lbs / 14,64kg shells, 150 per gun
     Quick firing guns in deck mounts, 1916 Model
     2 x Single mounts on centreline, aft evenly spread
      1 - 3,00" / 76,2 mm 45,0 cal gun - 13,62lbs / 6,18kg shells, 180 per gun
     Breech loading gun in deck mount, 1916 Model
     1 x Single mount on centreline, aft deck aft
      1 raised mount
      4 - 0,30" / 7,7 mm 90,0 cal guns - 0,02lbs / 0,01kg shells, 4 000 per gun
     Machine guns in deck mounts, 1916 Model
     4 x Single mounts on sides, forward evenly spread
      Weight of broadside 78 lbs / 35 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,39" / 10 mm         -               -
   2nd:   0,39" / 10 mm         -               -
   3rd:   0,39" / 10 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 10 144 shp / 7 568 Kw = 28,02 kts
   Range 3 000nm at 10,00 kts
   Bunker at max displacement = 57 tons

Complement:
   48 - 63

Cost:
   £0,081 million / $0,322 million

Distribution of weights at normal displacement:
   Armament: 14 tons, 3,1 %
      - Guns: 14 tons, 3,1 %
   Armour: 7 tons, 1,6 %
      - Armament: 7 tons, 1,6 %
   Machinery: 224 tons, 50,0 %
   Hull, fittings & equipment: 143 tons, 31,9 %
   Fuel, ammunition & stores: 48 tons, 10,7 %
   Miscellaneous weights: 12 tons, 2,7 %
      - On freeboard deck: 12 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     159 lbs / 72 Kg = 5,0 x 4,0 " / 102 mm shells or 0,2 torpedoes
   Stability (Unstable if below 1.00): 1,16
   Metacentric height 0,8 ft / 0,2 m
   Roll period: 11,5 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0,25
   Seaboat quality  (Average = 1.00): 1,00

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0,400 / 0,408
   Length to Beam Ratio: 10,00 : 1
   'Natural speed' for length: 15,58 kts
   Power going to wave formation at top speed: 66 %
   Trim (Max stability = 0, Max steadiness = 100): 70
   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:   17,50 %,  13,19 ft / 4,02 m,  11,22 ft / 3,42 m
      - Forward deck:   32,50 %,  11,22 ft / 3,42 m,  9,91 ft / 3,02 m
      - Aft deck:   32,50 %,  9,91 ft / 3,02 m,  9,91 ft / 3,02 m
      - Quarter deck:   17,50 %,  9,91 ft / 3,02 m,  10,50 ft / 3,20 m
      - Average freeboard:      10,54 ft / 3,21 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 170,4 %
      - Above water (accommodation/working, high = better): 133,1 %
   Waterplane Area: 3 628 Square feet or 337 Square metres
   Displacement factor (Displacement / loading): 55 %
   Structure weight / hull surface area: 22 lbs/sq ft or 108 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,50
      - Longitudinal: 1,96
      - Overall: 0,57
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

12 tons for 4TTx450

Trial speed : 31kts
Bonus : 2.98

[Jefgte]

...Simply, the update of the D8 class with 120mm guns.

D9, Byzantine Empire Long Range Destroyer laid down 1916

Displacement:
   1 060 t light; 1 101 t standard; 1 217 t normal; 1 310 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (347,77 ft / 347,77 ft) x 35,43 ft x (8,86 / 9,30 ft)
   (106,00 m / 106,00 m) x 10,80 m  x (2,70 / 2,83 m)

Armament:
      4 - 4,72" / 120 mm 45,0 cal guns - 53,03lbs / 24,05kg shells, 130 per gun
     Quick firing guns in deck mounts, 1916 Model
     4 x Single mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      1 - 3,00" / 76,2 mm 45,0 cal gun - 13,62lbs / 6,18kg shells, 150 per gun
      Anti-air gun in deck mount, 1916 Model
     1 x Single mount on centreline, forward deck aft
      1 raised mount
      2 - 0,30" / 7,7 mm 90,0 cal guns - 0,02lbs / 0,01kg shells, 2 000 per gun
     Machine guns in deck mounts, 1916 Model
     2 x Single mounts on sides, forward deck forward
      Weight of broadside 226 lbs / 102 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,39" / 10 mm         -               -
   2nd:   0,39" / 10 mm         -               -
   4th:   0,39" / 10 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 21 000 shp / 15 666 Kw = 30,01 kts
   Range 6 000nm at 10,00 kts
   Bunker at max displacement = 209 tons

Complement:
   102 - 133

Cost:
   £0,214 million / $0,855 million

Distribution of weights at normal displacement:
   Armament: 40 tons, 3,3 %
      - Guns: 40 tons, 3,3 %
   Armour: 7 tons, 0,6 %
      - Armament: 7 tons, 0,6 %
  Machinery: 591 tons, 48,5 %

48,5 % => Not in the rules...

[TacCovert4]

Update T400- Red Sea class
2x3" => 2x4"+1x3"AA
28.5Kts=> 28kts
2800nm=> 3000nm

=> A more powerfull TB

Red Sea Class, Byzantine Empire T400 laid down 1916

Displacement:
   400 t light; 416 t standard; 448 t normal; 473 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (242,78 ft / 242,78 ft) x 24,28 ft x (6,64 / 6,89 ft)
   (74,00 m / 74,00 m) x 7,40 m  x (2,03 / 2,10 m)

Armament:
      2 - 4,00" / 102 mm 45,0 cal guns - 32,27lbs / 14,64kg shells, 150 per gun
     Quick firing guns in deck mounts, 1916 Model
     2 x Single mounts on centreline, aft evenly spread
      1 - 3,00" / 76,2 mm 45,0 cal gun - 13,62lbs / 6,18kg shells, 180 per gun
     Breech loading gun in deck mount, 1916 Model
     1 x Single mount on centreline, aft deck aft
      1 raised mount
      4 - 0,30" / 7,7 mm 90,0 cal guns - 0,02lbs / 0,01kg shells, 4 000 per gun
     Machine guns in deck mounts, 1916 Model
     4 x Single mounts on sides, forward evenly spread
      Weight of broadside 78 lbs / 35 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,39" / 10 mm         -               -
   2nd:   0,39" / 10 mm         -               -
   3rd:   0,39" / 10 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 10 144 shp / 7 568 Kw = 28,02 kts
   Range 3 000nm at 10,00 kts
   Bunker at max displacement = 57 tons

Complement:
   48 - 63

Cost:
   £0,081 million / $0,322 million

Distribution of weights at normal displacement:
   Armament: 14 tons, 3,1 %
      - Guns: 14 tons, 3,1 %
   Armour: 7 tons, 1,6 %
      - Armament: 7 tons, 1,6 %
   Machinery: 224 tons, 50,0 %
   Hull, fittings & equipment: 143 tons, 31,9 %
   Fuel, ammunition & stores: 48 tons, 10,7 %
   Miscellaneous weights: 12 tons, 2,7 %
      - On freeboard deck: 12 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     159 lbs / 72 Kg = 5,0 x 4,0 " / 102 mm shells or 0,2 torpedoes
   Stability (Unstable if below 1.00): 1,16
   Metacentric height 0,8 ft / 0,2 m
   Roll period: 11,5 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0,25
   Seaboat quality  (Average = 1.00): 1,00

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0,400 / 0,408
   Length to Beam Ratio: 10,00 : 1
   'Natural speed' for length: 15,58 kts
   Power going to wave formation at top speed: 66 %
   Trim (Max stability = 0, Max steadiness = 100): 70
   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:   17,50 %,  13,19 ft / 4,02 m,  11,22 ft / 3,42 m
      - Forward deck:   32,50 %,  11,22 ft / 3,42 m,  9,91 ft / 3,02 m
      - Aft deck:   32,50 %,  9,91 ft / 3,02 m,  9,91 ft / 3,02 m
      - Quarter deck:   17,50 %,  9,91 ft / 3,02 m,  10,50 ft / 3,20 m
      - Average freeboard:      10,54 ft / 3,21 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 170,4 %
      - Above water (accommodation/working, high = better): 133,1 %
   Waterplane Area: 3 628 Square feet or 337 Square metres
   Displacement factor (Displacement / loading): 55 %
   Structure weight / hull surface area: 22 lbs/sq ft or 108 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,50
      - Longitudinal: 1,96
      - Overall: 0,57
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

12 tons for 4TTx450

Trial speed : 31kts
Bonus : 2.98

2 Things:

1)  If you're doing 18in TT (450mm), then you only need 2 tons per torpedo/tube.  So you could add an additional 2 torpedoes.  Or you can upgrade the torps to 21in (533mm) units.

2)  I see you have a 76mm breech-loading gun.  Is this supposed to be some sort of old gun, or is this a typo on an AA mount?

[Jefgte]

2 Things:

1)  If you're doing 18in TT (450mm), then you only need 2 tons per torpedo/tube.  So you could add an additional 2 torpedoes.  Or you can upgrade the torps to 21in (533mm) units.

2)  I see you have a 76mm breech-loading gun.  Is this supposed to be some sort of old gun, or is this a typo on an AA mount?

1=> D9 class is a Fleet Destroyer, heavier 533 are chosen, identical to D8 class.
2=> 76.2 is AA gun

1916H1 report is with 1060t => Update 1916H2 report from 1060t to 1140t


D9, Byzantine Empire Long Range Destroyer laid down 1916

Displacement:
   1 140 t light; 1 184 t standard; 1 305 t normal; 1 403 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (354,33 ft / 354,33 ft) x 35,43 ft x (9,33 / 9,77 ft)
   (108,00 m / 108,00 m) x 10,80 m  x (2,84 / 2,98 m)

Armament:
      4 - 4,72" / 120 mm 45,0 cal guns - 53,02lbs / 24,05kg shells, 140 per gun
     Quick firing guns in deck mounts, 1916 Model
     4 x Single mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      1 - 3,00" / 76,2 mm 45,0 cal gun - 13,62lbs / 6,18kg shells, 160 per gun
     Anti-air gun in deck mount, 1916 Model
     1 x Single mount on centreline, forward deck aft
      1 raised mount
      2 - 0,30" / 7,7 mm 90,0 cal guns - 0,02lbs / 0,01kg shells, 2 000 per gun
     Machine guns in deck mounts, 1916 Model
     2 x Single mounts on sides, forward deck forward
      Weight of broadside 226 lbs / 102 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,39" / 10 mm         -               -
   2nd:   0,39" / 10 mm         -               -
   4th:   0,39" / 10 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 23 750 shp / 17 718 Kw = 30,68 kts
   Range 6 000nm at 10,00 kts
   Bunker at max displacement = 219 tons

Complement:
   108 - 141

Cost:
   £0,233 million / $0,930 million

Distribution of weights at normal displacement:
   Armament: 40 tons, 3,1 %
      - Guns: 40 tons, 3,1 %
   Armour: 6 tons, 0,5 %
      - Armament: 6 tons, 0,5 %
   Machinery: 653 tons, 50,0 %
   Hull, fittings & equipment: 350 tons, 26,8 %
   Fuel, ammunition & stores: 165 tons, 12,7 %
   Miscellaneous weights: 91 tons, 7,0 %
      - On freeboard deck: 62 tons
      - Above deck: 29 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     417 lbs / 189 Kg = 7,9 x 4,7 " / 120 mm shells or 0,3 torpedoes
   Stability (Unstable if below 1.00): 1,23
   Metacentric height 1,5 ft / 0,5 m
   Roll period: 12,0 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0,22
   Seaboat quality  (Average = 1.00): 1,02

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0,390 / 0,400
   Length to Beam Ratio: 10,00 : 1
   'Natural speed' for length: 18,82 kts
   Power going to wave formation at top speed: 61 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   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:   17,50 %,  17,72 ft / 5,40 m,  14,76 ft / 4,50 m
      - Forward deck:   32,50 %,  14,76 ft / 4,50 m,  11,81 ft / 3,60 m
      - Aft deck:   32,50 %,  11,81 ft / 3,60 m,  11,81 ft / 3,60 m
      - Quarter deck:   17,50 %,  11,81 ft / 3,60 m,  12,47 ft / 3,80 m
      - Average freeboard:      13,07 ft / 3,98 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 169,9 %
      - Above water (accommodation/working, high = better): 169,9 %
   Waterplane Area: 7 676 Square feet or 713 Square metres
   Displacement factor (Displacement / loading): 66 %
   Structure weight / hull surface area: 30 lbs/sq ft or 145 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,50
      - Longitudinal: 1,07
      - Overall: 0,54
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

32t for 8TT x 533
4t for 1913 top mast rangefinder
25t for LR marconi
6t for additionnal engines ventillation
24t reserved for Troops, Materials, DC, Minen...

[Jefgte]

Izmir - Ineas, Byzantine Empire Fast Colonial Battleship laid down 1917

Displacement:
   16 950 t light; 17 842 t standard; 18 986 t normal; 19 902 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (573,33 ft / 573,33 ft) x 83,10 ft x (27,08 / 28,08 ft)
   (174,75 m / 174,75 m) x 25,33 m  x (8,25 / 8,56 m)

Armament:
      6 - 13,50" / 343 mm 45,0 cal guns - 1 241,76lbs / 563,25kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1917 Model
     2 x Triple mounts on centreline ends, evenly spread
      12 - 6,00" / 152 mm 45,0 cal guns - 108,92lbs / 49,41kg shells, 125 per gun
     Quick firing guns in casemate mounts, 1917 Model
     12 x Single mounts on sides, evenly spread
      6 - 3,00" / 76,2 mm 45,0 cal guns - 13,62lbs / 6,18kg shells, 160 per gun
     Anti-air guns in deck mounts, 1917 Model
     6 x Single mounts on side ends, majority aft
      6 raised mounts
      8 - 0,30" / 7,7 mm 90,0 cal guns - 0,02lbs / 0,01kg shells, 4 000 per gun
     Machine guns in deck mounts, 1917 Model
     8 x Single mounts on side ends, evenly spread
      8 raised mounts
      Weight of broadside 8 839 lbs / 4 009 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   11,8" / 300 mm   374,02 ft / 114,00 m   10,17 ft / 3,10 m
   Ends:   3,94" / 100 mm   196,85 ft / 60,00 m   7,22 ft / 2,20 m
     2,46 ft / 0,75 m Unarmoured ends
   Upper:   3,94" / 100 mm   374,02 ft / 114,00 m   8,86 ft / 2,70 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Strengthened structural bulkheads:
      1,38" / 35 mm   374,02 ft / 114,00 m   25,59 ft / 7,80 m
   Beam between torpedo bulkheads 83,10 ft / 25,33 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13,4" / 340 mm   5,91" / 150 mm      11,8" / 300 mm
   3rd:   1,97" / 50 mm         -               -
   4th:   0,77" / 20 mm         -               -
   5th:   0,39" / 10 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 2,95" / 75 mm
   Forecastle: 1,18" / 30 mm  Quarter deck: 1,18" / 30 mm

   - Conning towers: Forward 12,60" / 320 mm, Aft 3,94" / 100 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 68 000 shp / 50 728 Kw = 27,02 kts
   Range 7 500nm at 12,00 kts
   Bunker at max displacement = 2 060 tons (20% coal)

Complement:
   808 - 1 051

Cost:
   £3,109 million / $12,434 million

Distribution of weights at normal displacement:
   Armament: 1 519 tons, 8,0 %
      - Guns: 1 519 tons, 8,0 %
   Armour: 6 148 tons, 32,4 %
      - Belts: 2 690 tons, 14,2 %
      - Torpedo bulkhead: 488 tons, 2,6 %
      - Armament: 1 148 tons, 6,0 %
      - Armour Deck: 1 569 tons, 8,3 %
      - Conning Towers: 254 tons, 1,3 %
   Machinery: 2 539 tons, 13,4 %
   Hull, fittings & equipment: 6 307 tons, 33,2 %
   Fuel, ammunition & stores: 2 036 tons, 10,7 %
   Miscellaneous weights: 437 tons, 2,3 %
      - Hull below water: 24 tons
      - Hull above water: 118 tons
      - On freeboard deck: 118 tons
      - Above deck: 177 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     22 812 lbs / 10 348 Kg = 18,5 x 13,5 " / 343 mm shells or 3,8 torpedoes
   Stability (Unstable if below 1.00): 1,10
   Metacentric height 4,5 ft / 1,4 m
   Roll period: 16,4 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0,65
   Seaboat quality  (Average = 1.00): 1,10

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0,515 / 0,521
   Length to Beam Ratio: 6,90 : 1
   'Natural speed' for length: 23,94 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 64
   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:   17,50 %,  24,61 ft / 7,50 m,  20,34 ft / 6,20 m
      - Forward deck:   32,50 %,  20,34 ft / 6,20 m,  17,06 ft / 5,20 m
      - Aft deck:   32,50 %,  17,06 ft / 5,20 m,  17,06 ft / 5,20 m
      - Quarter deck:   17,50 %,  17,06 ft / 5,20 m,  17,06 ft / 5,20 m
      - Average freeboard:      18,47 ft / 5,63 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 81,0 %
      - Above water (accommodation/working, high = better): 135,7 %
   Waterplane Area: 32 185 Square feet or 2 990 Square metres
   Displacement factor (Displacement / loading): 100 %
   Structure weight / hull surface area: 159 lbs/sq ft or 777 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,93
      - Longitudinal: 1,76
      - Overall: 1,00
   Excellent machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

24t for 8 TT x 18''
152t for 1913 Fire Control
25t for Marconi
80t for additionnal pumps
80t for additionnal ventilation
76t reserved for troops, materials, mines...

[snip]

Izmir - Ineas, Byzantine Empire Fast Colonial Battleship laid down 1917
   - Torpedo Bulkhead - Strengthened structural bulkheads:
      1,38" / 35 mm   374,02 ft / 114,00 m   25,59 ft / 7,80 m
   Beam between torpedo bulkheads 83,10 ft / 25,33 m

Must be the Additional Bulkheads option.

[Jefgte]

Must be the Additional Bulkheads option.

Just a new SS...
Izmir class is not in the Plan...

[Jefgte]

Update SC5 from 27 to 29kts
Always the same armament & armor
6x191+6x120+2x76.2AA+8TTx457+80minen.
B90-35-D35-25-T70

SC6, Byzantine Empire SC6 laid down 1918

Displacement:
   5 950 t light; 6 225 t standard; 6 867 t normal; 7 380 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (532,50 ft / 531,50 ft) x 55,12 ft x (16,41 / 17,33 ft)
   (162,30 m / 162,00 m) x 16,80 m  x (5,00 / 5,28 m)

Armament:
      4 - 7,50" / 191 mm 45,0 cal guns - 212,74lbs / 96,50kg shells, 140 per gun
     Breech loading guns in deck and hoist mounts, 1918 Model
     4 x Single mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      2 - 7,50" / 191 mm 45,0 cal guns - 212,74lbs / 96,50kg shells, 140 per gun
     Breech loading guns in deck and hoist mounts, 1918 Model
     2 x Single mounts on centreline, aft deck forward
      1 raised mount - superfiring
      6 - 4,72" / 120 mm 45,0 cal guns - 53,03lbs / 24,05kg shells, 200 per gun
     Quick firing guns in deck mounts, 1918 Model
     6 x Single mounts on sides, evenly spread
      2 - 3,00" / 76,2 mm 45,0 cal guns - 13,62lbs / 6,18kg shells, 200 per gun
     Anti-air guns in deck mounts, 1918 Model
     2 x Single mounts on sides, forward deck centre
      2 raised mounts
      4 - 0,30" / 7,7 mm 90,0 cal guns - 0,02lbs / 0,01kg shells, 4 000 per gun
     Machine guns in deck mounts, 1918 Model
     4 x Single mounts on side ends, evenly spread
      4 raised mounts
      Weight of broadside 1 622 lbs / 736 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3,54" / 90 mm   360,89 ft / 110,00 m   9,84 ft / 3,00 m
   Ends:   1,38" / 35 mm   167,32 ft / 51,00 m   9,84 ft / 3,00 m
     3,28 ft / 1,00 m Unarmoured ends
     Main Belt covers 104 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2,76" / 70 mm   0,79" / 20 mm      2,17" / 55 mm
   2nd:   2,76" / 70 mm   0,79" / 20 mm      2,17" / 55 mm
   3rd:   0,78" / 20 mm         -               -
   4th:   0,39" / 10 mm         -               -
   5th:   0,39" / 10 mm         -               -

   - Protected deck - single deck:
   For and Aft decks: 1,38" / 35 mm
   Forecastle: 0,98" / 25 mm  Quarter deck: 0,98" / 25 mm

   - Conning towers: Forward 3,54" / 90 mm, Aft 2,76" / 70 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 48 000 shp / 35 808 Kw = 29,10 kts
   Range 8 000nm at 12,00 kts
   Bunker at max displacement = 1 154 tons (20% coal)

Complement:
   376 - 490

Cost:
   £1,183 million / $4,734 million

Distribution of weights at normal displacement:
   Armament: 395 tons, 5,8 %
      - Guns: 395 tons, 5,8 %
   Armour: 1 198 tons, 17,5 %
      - Belts: 598 tons, 8,7 %
      - Armament: 77 tons, 1,1 %
      - Armour Deck: 474 tons, 6,9 %
      - Conning Towers: 49 tons, 0,7 %
   Machinery: 1 764 tons, 25,7 %
   Hull, fittings & equipment: 2 347 tons, 34,2 %
   Fuel, ammunition & stores: 916 tons, 13,3 %
   Miscellaneous weights: 246 tons, 3,6 %
      - Hull above water: 30 tons
      - On freeboard deck: 152 tons
      - Above deck: 64 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     7 190 lbs / 3 261 Kg = 34,1 x 7,5 " / 191 mm shells or 1,3 torpedoes
   Stability (Unstable if below 1.00): 1,11
   Metacentric height 2,5 ft / 0,8 m
   Roll period: 14,6 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0,61
   Seaboat quality  (Average = 1.00): 1,14

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0,500 / 0,509
   Length to Beam Ratio: 9,64 : 1
   'Natural speed' for length: 23,05 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 61
   Bow angle (Positive = bow angles forward): 0,00 degrees
   Stern overhang: 1,00 ft / 0,30 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   17,50 %,  22,31 ft / 6,80 m,  19,03 ft / 5,80 m
      - Forward deck:   32,50 %,  19,03 ft / 5,80 m,  15,75 ft / 4,80 m
      - Aft deck:   32,50 %,  15,75 ft / 4,80 m,  15,75 ft / 4,80 m
      - Quarter deck:   17,50 %,  15,75 ft / 4,80 m,  15,75 ft / 4,80 m
      - Average freeboard:      17,08 ft / 5,21 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 102,8 %
      - Above water (accommodation/working, high = better): 163,8 %
   Waterplane Area: 19 519 Square feet or 1 813 Square metres
   Displacement factor (Displacement / loading): 109 %
   Structure weight / hull surface area: 86 lbs/sq ft or 420 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,87
      - Longitudinal: 1,13
      - Overall: 0,90
   Caution: Hull subject to strain in open-sea
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

25t for Long Range Marconi
39t for top mast rangefinder
30t for climatisation
30t for additionnal pumps
24t for 8TTx18"
80t for 2x40 minen
18t reserved

[Jefgte]

From Kaiser

As a storyline matter I want more "coast guard" gunboat type ships to patrol my extremely extensive coastlines.
The new Aux patrol sloops will fit nicely in that part of the concept, but are rather light on the gun batteries.
I also want something with "gunboat" in the look, which could credibly be providing needed force if
the new members of the Parthian Empire need further persuading, something needs to back up the Marines.
Alternately, credibly be stopping piracy, slavery etc where they may shoot back.

Byzantine answer

However, ocean-going vessels with respectable performance are needed.
DE or TGB concept is relevant. Byzantium must also replace 500t TGBs built in 1892.

TGB700, Byzantine Empire Colonial Destroyer laid down 1917

Displacement:
   700 t light; 734 t standard; 795 t normal; 844 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (261,81 ft / 261,81 ft) x 27,23 ft x (9,76 / 10,15 ft)
   (79,80 m / 79,80 m) x 8,30 m  x (2,98 / 3,09 m)

Armament:
      3 - 4,72" / 120 mm 45,0 cal guns - 53,03lbs / 24,05kg shells, 185 per gun
     Quick firing guns in deck mounts, 1917 Model
     3 x Single mounts on centreline ends, majority forward
      1 raised mount - superfiring
      1 - 3,00" / 76,2 mm 45,0 cal gun - 13,62lbs / 6,18kg shells, 200 per gun
     Anti-air gun in deck mount, 1917 Model
     1 x Single mount on centreline, aft deck aft
      1 raised mount
      2 - 0,30" / 7,7 mm 90,0 cal guns - 0,02lbs / 0,01kg shells, 3 000 per gun
     Machine guns in deck mounts, 1917 Model
     2 x Single mounts on sides, forward deck forward
      Weight of broadside 173 lbs / 78 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,39" / 10 mm         -               -
   2nd:   0,39" / 10 mm         -               -
   4th:   0,39" / 10 mm         -               -

Machinery:
   Coal and oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 17 440 shp / 13 010 Kw = 29,45 kts
   Range 4 000nm at 10,00 kts
   Bunker at max displacement = 111 tons (25% coal)

Complement:
   74 - 97

Cost:
   £0,161 million / $0,644 million

Distribution of weights at normal displacement:
   Armament: 31 tons, 3,8 %
      - Guns: 31 tons, 3,8 %
   Armour: 5 tons, 0,7 %
      - Armament: 5 tons, 0,7 %
   Machinery: 397 tons, 50,0 %
   Hull, fittings & equipment: 222 tons, 27,9 %
   Fuel, ammunition & stores: 95 tons, 12,0 %
   Miscellaneous weights: 45 tons, 5,7 %
      - On freeboard deck: 42 tons
      - Above deck: 3 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     234 lbs / 106 Kg = 4,4 x 4,7 " / 120 mm shells or 0,2 torpedoes
   Stability (Unstable if below 1.00): 1,12
   Metacentric height 0,9 ft / 0,3 m
   Roll period: 12,2 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0,43
   Seaboat quality  (Average = 1.00): 1,00

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0,400 / 0,408
   Length to Beam Ratio: 9,61 : 1
   'Natural speed' for length: 16,18 kts
   Power going to wave formation at top speed: 68 %
   Trim (Max stability = 0, Max steadiness = 100): 70
   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:   18,00 %,  16,57 ft / 5,05 m,  13,52 ft / 4,12 m
      - Forward deck:   33,00 %,  13,52 ft / 4,12 m,  11,22 ft / 3,42 m
      - Aft deck:   33,00 %,  11,22 ft / 3,42 m,  10,56 ft / 3,22 m
      - Quarter deck:   16,00 %,  10,56 ft / 3,22 m,  11,22 ft / 3,42 m
      - Average freeboard:      12,07 ft / 3,68 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 172,5 %
      - Above water (accommodation/working, high = better): 131,4 %
   Waterplane Area: 4 389 Square feet or 408 Square metres
   Displacement factor (Displacement / loading): 55 %
   Structure weight / hull surface area: 27 lbs/sq ft or 132 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,50
      - Longitudinal: 2,42
      - Overall: 0,58
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

3t for top mast rangefinder
18t for 2x3TTx18"
24t reserved for new armament, materials, troops, minen...
Trial speed: 31kts
Bonus: 1.55

[Jefgte]

Similar with overall cruiser : 0.9

TGB720, Byzantine Empire Colonial Destroyer laid down 1917

Displacement:
   720 t light; 756 t standard; 877 t normal; 975 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (261,81 ft / 261,81 ft) x 37,40 ft x (7,23 / 7,78 ft)
   (79,80 m / 79,80 m) x 11,40 m  x (2,20 / 2,37 m)

Armament:
      3 - 4,72" / 120 mm 45,0 cal guns - 53,03lbs / 24,05kg shells, 185 per gun
     Quick firing guns in deck mounts, 1917 Model
     3 x Single mounts on centreline ends, majority forward
      1 raised mount - superfiring
      1 - 3,00" / 76,2 mm 45,0 cal gun - 13,62lbs / 6,18kg shells, 200 per gun
     Anti-air gun in deck mount, 1917 Model
     1 x Single mount on centreline, aft deck aft
      1 raised mount
      2 - 0,30" / 7,7 mm 90,0 cal guns - 0,02lbs / 0,01kg shells, 3 000 per gun
     Machine guns in deck mounts, 1917 Model
     2 x Single mounts on sides, forward deck forward
      Weight of broadside 173 lbs / 78 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,39" / 10 mm         -               -
   2nd:   0,39" / 10 mm         -               -
   4th:   0,39" / 10 mm         -               -

Machinery:
   Coal and oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 6 840 shp / 5 102 Kw = 22,76 kts
   Range 5 000nm at 12,00 kts
   Bunker at max displacement = 219 tons (25% coal)

Complement:
   79 - 104

Cost:
   £0,126 million / $0,505 million

Distribution of weights at normal displacement:
   Armament: 31 tons, 3,5 %
      - Guns: 31 tons, 3,5 %
   Armour: 5 tons, 0,6 %
      - Armament: 5 tons, 0,6 %
   Machinery: 257 tons, 29,2 %
   Hull, fittings & equipment: 366 tons, 41,8 %
   Fuel, ammunition & stores: 157 tons, 17,9 %
   Miscellaneous weights: 61 tons, 7,0 %
      - On freeboard deck: 58 tons
      - Above deck: 3 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1 322 lbs / 600 Kg = 25,2 x 4,7 " / 120 mm shells or 0,6 torpedoes
   Stability (Unstable if below 1.00): 1,25
   Metacentric height 1,7 ft / 0,5 m
   Roll period: 12,0 seconds
   Steadiness   - As gun platform (Average = 50 %): 72 %
         - Recoil effect (Restricted arc if above 1.00): 0,15
   Seaboat quality  (Average = 1.00): 1,03

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0,434 / 0,448
   Length to Beam Ratio: 7,00 : 1
   'Natural speed' for length: 16,18 kts
   Power going to wave formation at top speed: 59 %
   Trim (Max stability = 0, Max steadiness = 100): 70
   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:   18,00 %,  16,57 ft / 5,05 m,  13,52 ft / 4,12 m
      - Forward deck:   33,00 %,  13,52 ft / 4,12 m,  11,22 ft / 3,42 m
      - Aft deck:   33,00 %,  11,22 ft / 3,42 m,  10,56 ft / 3,22 m
      - Quarter deck:   16,00 %,  10,56 ft / 3,22 m,  11,22 ft / 3,42 m
      - Average freeboard:      12,07 ft / 3,68 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 105,3 %
      - Above water (accommodation/working, high = better): 173,0 %
   Waterplane Area: 6 168 Square feet or 573 Square metres
   Displacement factor (Displacement / loading): 133 %
   Structure weight / hull surface area: 43 lbs/sq ft or 212 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,82
      - Longitudinal: 1,99
      - Overall: 0,90
   Caution: Hull subject to strain in open-sea
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

3t for top mast rangefinder
18t for 2x3TTx18"
40t reserved for new armament, materials, troops, minen...

[Jefgte]

Finally, for all colonial works => improved Aden class.
600t => 680t
TGB concept
Machinery weight 52% => 50% for powerful armament & reserve
3x102 => 3x120
Reserve 4t => 18t
3500nm@10kts => 3500nm@12kts
Bunker 89t => 139t

Improved T600 Aden class, Byzantine Empire Colonial T680 laid down 1918

Displacement:
   680 t light; 714 t standard; 791 t normal; 853 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (262,23 ft / 260,83 ft) x 26,08 ft x (10,12 / 10,64 ft)
   (79,93 m / 79,50 m) x 7,95 m  x (3,09 / 3,24 m)

Armament:
      3 - 4,72" / 120 mm 45,0 cal guns - 53,03lbs / 24,05kg shells, 180 per gun
     Quick firing guns in deck mounts, 1918 Model
     3 x Single mounts on centreline ends, majority forward
      1 raised mount - superfiring
      1 - 3,00" / 76,2 mm 45,0 cal gun - 13,62lbs / 6,18kg shells, 200 per gun
     Anti-air gun in deck mount, 1918 Model
     1 x Single mount on centreline, aft deck aft
      1 raised mount
      2 - 0,30" / 7,7 mm 90,0 cal guns - 0,02lbs / 0,01kg shells, 5 000 per gun
     Machine guns in deck mounts, 1918 Model
     2 x Single mounts on sides, forward deck forward
      Weight of broadside 173 lbs / 78 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,39" / 10 mm         -               -
   2nd:   0,39" / 10 mm         -               -
   4th:   0,39" / 10 mm         -               -

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 17 200 shp / 12 831 Kw = 29,40 kts
   Range 3 500nm at 12,00 kts
   Bunker at max displacement = 139 tons (25% coal)

Complement:
   73 - 96

Cost:
   £0,175 million / $0,700 million

Distribution of weights at normal displacement:
   Armament: 31 tons, 3,9 %
      - Guns: 31 tons, 3,9 %
   Armour: 5 tons, 0,7 %
      - Armament: 5 tons, 0,7 %
   Machinery: 396 tons, 50,0 %
   Hull, fittings & equipment: 216 tons, 27,3 %
   Fuel, ammunition & stores: 110 tons, 14,0 %
   Miscellaneous weights: 33 tons, 4,2 %
      - On freeboard deck: 30 tons
      - Above deck: 3 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     225 lbs / 102 Kg = 4,3 x 4,7 " / 120 mm shells or 0,2 torpedoes
   Stability (Unstable if below 1.00): 1,12
   Metacentric height 0,8 ft / 0,3 m
   Roll period: 12,0 seconds
   Steadiness   - As gun platform (Average = 50 %): 73 %
         - Recoil effect (Restricted arc if above 1.00): 0,49
   Seaboat quality  (Average = 1.00): 1,04

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0,402 / 0,412
   Length to Beam Ratio: 10,00 : 1
   'Natural speed' for length: 16,15 kts
   Power going to wave formation at top speed: 67 %
   Trim (Max stability = 0, Max steadiness = 100): 70
   Bow angle (Positive = bow angles forward): 5,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   18,00 %,  16,08 ft / 4,90 m,  13,12 ft / 4,00 m
      - Forward deck:   33,00 %,  13,12 ft / 4,00 m,  10,83 ft / 3,30 m
      - Aft deck:   33,00 %,  10,83 ft / 3,30 m,  10,83 ft / 3,30 m
      - Quarter deck:   16,00 %,  10,83 ft / 3,30 m,  11,48 ft / 3,50 m
      - Average freeboard:      11,88 ft / 3,62 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 172,6 %
      - Above water (accommodation/working, high = better): 124,7 %
   Waterplane Area: 4 192 Square feet or 389 Square metres
   Displacement factor (Displacement / loading): 57 %
   Structure weight / hull surface area: 27 lbs/sq ft or 130 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,50
      - Longitudinal: 2,49
      - Overall: 0,59
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

3t for top mast rangefinder
12t for 4TTx18"
5t for Hydrophone
3t for 30x90kg DC
10t reserved for new armament, materials, troops, minen...

Trial speed: 31kts
Bonus: 1.6

[Jefgte]

Patrol boat with Mercantile rules

P900, Byzantine Empire Patrol Boat laid down 1917

Displacement:
   767 t light; 791 t standard; 900 t normal; 986 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (259,19 ft / 259,19 ft) x 32,48 ft x (7,48 / 8,02 ft)
   (79,00 m / 79,00 m) x 9,90 m  x (2,28 / 2,44 m)

Armament:
      2 - 4,02" / 102 mm 45,0 cal guns - 32,66lbs / 14,81kg shells, 150 per gun
     Anti-air guns in deck mounts, 1917 Model
     2 x Single mounts on centreline ends, evenly spread
      1 - 3,00" / 76,2 mm 0,0 cal gun - 11,60lbs / 5,26kg shells, 200 per gun
     Anti-air gun in deck mount, 1917 Model
     1 x Single mount on centreline, aft deck centre
      1 raised mount
      2 - 0,30" / 7,7 mm 0,0 cal guns - 0,01lbs / 0,01kg shells, 5 000 per gun
     Machine guns in deck mounts, 1917 Model
     2 x 2 row twin mounts on sides, forward deck forward
      2 raised mounts
      Weight of broadside 77 lbs / 35 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,39" / 10 mm         -               -
   2nd:   0,39" / 10 mm         -               -

Machinery:
   Coal and oil fired boilers, complex reciprocating steam engines,
   Geared drive, 2 shafts, 5 900 ihp / 4 401 Kw = 21,77 kts
   Range 5 000nm at 10,00 kts
   Bunker at max displacement = 195 tons (50% coal)

Complement:
   81 - 106

Cost:
   £0,148 million / $0,591 million

Distribution of weights at normal displacement:
   Armament: 12 tons, 1,3 %
      - Guns: 12 tons, 1,3 %
   Armour: 1 tons, 0,1 %
      - Armament: 1 tons, 0,1 %
   Machinery: 366 tons, 40,7 %
   Hull, fittings & equipment: 352 tons, 39,1 %
   Fuel, ammunition & stores: 133 tons, 14,8 %
   Miscellaneous weights: 36 tons, 4,0 %
      - On freeboard deck: 10 tons
      - Above deck: 26 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     817 lbs / 371 Kg = 25,2 x 4,0 " / 102 mm shells or 0,4 torpedoes
   Stability (Unstable if below 1.00): 1,30
   Metacentric height 1,5 ft / 0,5 m
   Roll period: 11,2 seconds
   Steadiness   - As gun platform (Average = 50 %): 76 %
         - Recoil effect (Restricted arc if above 1.00): 0,07
   Seaboat quality  (Average = 1.00): 1,14

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0,500 / 0,511
   Length to Beam Ratio: 7,98 : 1
   'Natural speed' for length: 16,10 kts
   Power going to wave formation at top speed: 58 %
   Trim (Max stability = 0, Max steadiness = 100): 66
   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 %,  15,09 ft / 4,60 m,  11,81 ft / 3,60 m
      - Forward deck:   30,00 %,  11,81 ft / 3,60 m,  10,50 ft / 3,20 m
      - Aft deck:   30,00 %,  10,50 ft / 3,20 m,  10,50 ft / 3,20 m
      - Quarter deck:   20,00 %,  10,50 ft / 3,20 m,  10,50 ft / 3,20 m
      - Average freeboard:      11,22 ft / 3,42 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 135,6 %
      - Above water (accommodation/working, high = better): 142,4 %
   Waterplane Area: 5 609 Square feet or 521 Square metres
   Displacement factor (Displacement / loading): 113 %
   Structure weight / hull surface area: 42 lbs/sq ft or 206 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,94
      - Longitudinal: 1,85
      - Overall: 1,00
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

misc weight: 36t
1t for fire control
25t for Long Range Marconi
10t for additionnal ventilation

=>Mercantile rules
900t x 0.25
Cost 0.225BP & 0.225$

[Jefgte]

Update P900
I reduce slightly the speed to add 32t cargo in hold

P900, Byzantine Empire Patrol Boat laid down 1917

Displacement:
   767 t light; 791 t standard; 900 t normal; 986 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (259,19 ft / 259,19 ft) x 32,48 ft x (7,48 / 8,02 ft)
   (79,00 m / 79,00 m) x 9,90 m  x (2,28 / 2,44 m)

Armament:
      2 - 4,02" / 102 mm 45,0 cal guns - 32,65lbs / 14,81kg shells, 150 per gun
     Anti-air guns in deck mounts, 1917 Model
     2 x Single mounts on centreline ends, evenly spread
      1 - 3,00" / 76,2 mm 0,0 cal gun - 11,60lbs / 5,26kg shells, 200 per gun
     Anti-air gun in deck mount, 1917 Model
     1 x Single mount on centreline, aft deck centre
      1 raised mount
      2 - 0,30" / 7,7 mm 90,0 cal guns - 0,02lbs / 0,01kg shells, 5 000 per gun
     Machine guns in deck mounts, 1917 Model
     2 x 2 row twin mounts on sides, forward deck forward
      2 raised mounts
      Weight of broadside 77 lbs / 35 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,39" / 10 mm         -               -
   2nd:   0,39" / 10 mm         -               -

Machinery:
   Coal and oil fired boilers, complex reciprocating steam engines,
   Geared drive, 2 shafts, 5 400 ihp / 4 028 Kw = 21,31 kts
   Range 5 000nm at 10,00 kts
   Bunker at max displacement = 195 tons (50% coal)

Complement:
   81 - 106

Cost:
   £0,140 million / $0,560 million

Distribution of weights at normal displacement:
   Armament: 12 tons, 1,4 %
      - Guns: 12 tons, 1,4 %
   Armour: 1 tons, 0,1 %
      - Armament: 1 tons, 0,1 %
   Machinery: 335 tons, 37,2 %
   Hull, fittings & equipment: 350 tons, 39,0 %
   Fuel, ammunition & stores: 133 tons, 14,8 %
   Miscellaneous weights: 68 tons, 7,6 %
      - On freeboard deck: 42 tons
      - Above deck: 26 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     947 lbs / 429 Kg = 29,2 x 4,0 " / 102 mm shells or 0,5 torpedoes
   Stability (Unstable if below 1.00): 1,24
   Metacentric height 1,4 ft / 0,4 m
   Roll period: 11,7 seconds
   Steadiness   - As gun platform (Average = 50 %): 80 %
         - Recoil effect (Restricted arc if above 1.00): 0,08
   Seaboat quality  (Average = 1.00): 1,22

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0,500 / 0,511
   Length to Beam Ratio: 7,98 : 1
   'Natural speed' for length: 16,10 kts
   Power going to wave formation at top speed: 57 %
   Trim (Max stability = 0, Max steadiness = 100): 66
   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 %,  15,09 ft / 4,60 m,  12,14 ft / 3,70 m
      - Forward deck:   30,00 %,  12,14 ft / 3,70 m,  10,50 ft / 3,20 m
      - Aft deck:   30,00 %,  10,50 ft / 3,20 m,  10,50 ft / 3,20 m
      - Quarter deck:   20,00 %,  10,50 ft / 3,20 m,  10,50 ft / 3,20 m
      - Average freeboard:      11,31 ft / 3,45 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 124,7 %
      - Above water (accommodation/working, high = better): 143,5 %
   Waterplane Area: 5 609 Square feet or 521 Square metres
   Displacement factor (Displacement / loading): 117 %
   Structure weight / hull surface area: 42 lbs/sq ft or 204 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,93
      - Longitudinal: 1,88
      - Overall: 1,00
   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 weight: 68t
1t for fire control
25t for Long Range Marconi
10t for additionnal ventilation
32t Cargo reserved in hold


=>Mercantile rules
900t x 0.25
Cost 0.225BP & 0.225$