Public Data:
Chosen Class
RCN Chosen
Dimensions: 700.00 ft x 80.00 ft x 23.00 ft
Standard Displacement: 17,247 tons
Armament: 4x2 - 105 mm guns
4x2 - 75mm guns
4x4 - 40mm AA guns
8x3 - 25mm guns
Armour: Belt 4.00"
Main turrets 2.00", 2nd turret 2.00",
AA shield 1.00", Light AA gun shields 1.00",
Armour deck 3.00", Conning tower 3.00"
Machinery: 12 oil fired boilers, 4 sets of steam turbines,
Geared drive, 4 shafts, 135,000 shp = 30.00 kts
Range: 8,000nm at 15.00 kts
Complement: 55 Officers, 1000 other rank
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RCN Chosen, Chosen Carrier laid down 1925 in Japan
Displacement:
17,708 t light; 18,154 t standard; 20,240 t normal; 21,909 t full load
Dimensions: Length overall / water x beam x draught
706.38 ft / 700.00 ft x 80.00 ft x 23.00 ft (normal load)
215.30 m / 213.36 m x 24.38 m x 7.01 m
Armament:
8 - 4.13" / 105 mm guns (4x2 guns), 36.00lbs / 16.33kg shells, 1921 Model
Dual purpose guns in turrets (on barbettes)
on side ends, evenly spread, 2 raised mounts - superfiring
8 - 2.95" / 75.0 mm guns (4x2 guns), 12.00lbs / 5.44kg shells, 1921 Model
Dual purpose guns in turrets (on barbettes)
on side ends, evenly spread
16 - 1.57" / 40.0 mm guns (4x4 guns), 2.00lbs / 0.91kg shells, 1923 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
24 - 0.98" / 25.0 mm guns (8x3 guns), 0.57lbs / 0.26kg shells, 1918 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 430 lbs / 195 kg
Shells per gun, main battery: 150
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.00" / 102 mm 570.50 ft / 173.89 m 10.73 ft / 3.27 m
Ends: Unarmoured
Main Belt covers 125 % of normal length
- Torpedo Bulkhead:
1.00" / 25 mm 570.50 ft / 173.89 m 21.11 ft / 6.43 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm 1.00" / 25 mm 2.00" / 51 mm
2nd: 2.00" / 51 mm 1.00" / 25 mm 1.00" / 25 mm
3rd: 1.00" / 25 mm - -
4th: 1.00" / 25 mm - -
- Armour deck: 3.00" / 76 mm, Conning tower: 3.00" / 76 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 144,432 shp / 107,746 Kw = 33.00 kts
Range 10,000nm at 15.00 kts (Bunkerage = 3,754 tons)
Complement:
847 - 1,102
Cost:
£4.324 million / $17.296 million
Distribution of weights at normal displacement:
Armament: 54 tons, 0.3 %
Armour: 3,794 tons, 18.7 %
- Belts: 995 tons, 4.9 %
- Torpedo bulkhead: 446 tons, 2.2 %
- Armament: 136 tons, 0.7 %
- Armour Deck: 2,169 tons, 10.7 %
- Conning Tower: 48 tons, 0.2 %
Machinery: 4,689 tons, 23.2 %
Hull, fittings & equipment: 6,146 tons, 30.4 %
Fuel, ammunition & stores: 2,532 tons, 12.5 %
Miscellaneous weights: 3,025 tons, 14.9 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
14,494 lbs / 6,574 Kg = 410.3 x 4.1 " / 105 mm shells or 2.0 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 4.5 ft / 1.4 m
Roll period: 15.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.04
Seaboat quality (Average = 1.00): 1.06
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.550
Length to Beam Ratio: 8.75 : 1
'Natural speed' for length: 26.46 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 66
Bow angle (Positive = bow angles forward): 12.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 30.00 ft / 9.14 m
- Forecastle (20 %): 21.00 ft / 6.40 m
- Mid (50 %): 20.00 ft / 6.10 m
- Quarterdeck (15 %): 20.00 ft / 6.10 m
- Stern: 20.00 ft / 6.10 m
- Average freeboard: 21.07 ft / 6.42 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 125.3 %
- Above water (accommodation/working, high = better): 177.8 %
Waterplane Area: 39,082 Square feet or 3,631 Square metres
Displacement factor (Displacement / loading): 122 %
Structure weight / hull surface area: 109 lbs/sq ft or 530 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 1.00
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Space for 55 planes