Drawing originally by Wes/thesmilingassassin.
Capitan O'Brien-class, Atlantean Submarine laid down 1930 (Atlantis built)
Displacement:
1,013 t light; 1,042 t standard; 1,157 t normal; 1,250 t full load
Dimensions: Length overall / water x beam x draught
219.00 ft / 219.00 ft x 24.50 ft x 15.10 ft (normal load)
66.75 m / 66.75 m x 7.47 m x 4.60 m
Armament:
2 - 3.95" / 100 mm guns in single mounts, 30.81lbs / 13.98kg shells, 1930 Model
Breech loading guns in deck mounts
on centreline, all forward
1 - 1.58" / 40.0 mm guns in single mounts, 1.95lbs / 0.89kg shells, 1930 Model
Anti-aircraft gun in deck mount
on centreline aft, 1 raised gun
2 - 0.79" / 20.0 mm guns (1x2 guns), 0.24lbs / 0.11kg shells, 1930 Model
Anti-aircraft guns in deck mount
on centreline amidships, all raised guns - superfiring
4 - 0.50" / 12.7 mm guns (2x2 guns), 0.06lbs / 0.03kg shells, 1930 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 64 lbs / 29 kg
Shells per gun, main battery: 150
6 - 21.0" / 533.4 mm submerged torpedo tubes
Machinery:
Diesel Internal combustion generators plus batteries,
Electric motors, 2 shafts, 2,729 shp / 2,036 Kw = 17.05 kts
Range 5,200nm at 12.00 kts
Bunker at max displacement = 208 tons
Complement:
98 - 128
Cost:
£0.225 million / $0.900 million
Distribution of weights at normal displacement:
Armament: 8 tons, 0.7 %
Machinery: 83 tons, 7.1 %
Hull, fittings & equipment: 702 tons, 60.7 %
Fuel, ammunition & stores: 144 tons, 12.5 %
Miscellaneous weights: 220 tons, 19.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
646 lbs / 293 Kg = 21.0 x 4.0 " / 100 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 0.8 ft / 0.2 m
Roll period: 11.8 seconds
Steadiness - As gun platform (Average = 50 %): 0 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 0.00
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.500
Length to Beam Ratio: 8.94 : 1
'Natural speed' for length: 14.80 kts
Power going to wave formation at top speed: 49 %
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 (% = measuring location as a percentage of overall length):
- Stem: 0.00 ft / 0.00 m
- Forecastle (20 %): 0.00 ft / 0.00 m
- Mid (50 %): 0.00 ft / 0.00 m
- Quarterdeck (15 %): 0.00 ft / 0.00 m
- Stern: 0.00 ft / 0.00 m
- Average freeboard: 0.00 ft / 0.00 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 95.0 %
- Above water (accommodation/working, high = better): 0.0 %
Waterplane Area: 3,575 Square feet or 332 Square metres
Displacement factor (Displacement / loading): 257 %
Structure weight / hull surface area: 132 lbs/sq ft or 647 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 3.93
- Longitudinal: 2.44
- Overall: 2.75
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is extremely poor
Ship has quick, lively roll, not a steady gun platform
Diving Capabilities:
Operational diving depth: 275 feet (82.5 metres)
Emergency diving depth: 440 feet (132 metres)
Crush depth: 687.5 feet (206.25 metres)
Ships in Class:
-
Capitan O'Brien (H7) - 1930
-
Capitan Martinez (H8) - 1930