A large fleet replenishment vessel for prolonged operations, built to Navy standards rather than a converted ship. Some limited AA armament. Mostly a fuel and ammunition ship, with around 14500tons oil fuel carried.
One ship built 1938
Two ships built 1941
Fleet Replenishment Vessel, laid down 1938
Displacement:
7,437 t light; 7,770 t standard; 15,821 t normal; 22,262 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(468.38 ft / 459.32 ft) x 65.62 ft x (26.25 / 35.58 ft)
(142.76 m / 140.00 m) x 20.00 m x (8.00 / 10.84 m)
Armament:
2 - 2.99" / 76.0 mm 62.0 cal guns - 14.75lbs / 6.69kg shells, 300 per gun
Anti-air guns in deck and hoist mounts, 1938 Model
2 x Single mounts on sides, aft deck centre
4 - 1.46" / 37.0 mm 54.0 cal guns - 1.66lbs / 0.75kg shells, 2,000 per gun
Anti-air guns in deck mount, 1938 Model
1 x Quad mount on centreline, forward deck centre
2 - 1.46" / 37.0 mm 54.0 cal guns - 1.66lbs / 0.75kg shells, 2,000 per gun
Anti-air guns in deck mounts, 1938 Model
2 x Single mounts on sides, aft deck centre
Weight of broadside 39 lbs / 18 kg
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.79" / 20 mm -
2nd: 0.39" / 10 mm 0.39" / 10 mm -
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 20,000 shp / 14,920 Kw = 19.66 kts
Range 90,000nm at 12.00 kts
Bunker at max displacement = 14,492 tons
Complement:
704 - 916
Cost:
£1.927 million / $7.707 million
Distribution of weights at normal displacement:
Armament: 15 tons, 0.1 %
Armour: 11 tons, 0.1 %
- Armament: 11 tons, 0.1 %
Machinery: 548 tons, 3.5 %
Hull, fittings & equipment: 3,364 tons, 21.3 %
Fuel, ammunition & stores: 8,384 tons, 53.0 %
Miscellaneous weights: 3,500 tons, 22.1 %
- Hull below water: 2,000 tons
- Hull above water: 1,000 tons
- On freeboard deck: 500 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
56,815 lbs / 25,771 Kg = 4,241.8 x 3.0 " / 76 mm shells or 6.6 torpedoes
Stability (Unstable if below 1.00): 1.66
Metacentric height 6.2 ft / 1.9 m
Roll period: 11.1 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 2.00
Hull form characteristics:
Hull has raised forecastle, rise aft of midbreak,
a normal bow and a round stern
Block coefficient (normal/deep): 0.700 / 0.727
Length to Beam Ratio: 7.00 : 1
'Natural speed' for length: 21.43 kts
Power going to wave formation at top speed: 48 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 30.00 %, 32.81 ft / 10.00 m, 24.61 ft / 7.50 m
- Forward deck: 30.00 %, 16.40 ft / 5.00 m, 16.40 ft / 5.00 m
- Aft deck: 25.00 %, 24.61 ft / 7.50 m, 24.61 ft / 7.50 m
- Quarter deck: 15.00 %, 24.61 ft / 7.50 m, 24.61 ft / 7.50 m
- Average freeboard: 23.13 ft / 7.05 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 33.7 %
- Above water (accommodation/working, high = better): 131.6 %
Waterplane Area: 24,157 Square feet or 2,244 Square metres
Displacement factor (Displacement / loading): 340 %
Structure weight / hull surface area: 86 lbs/sq ft or 418 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.21
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
500tons handling equipment/cranes etc
3000tons stores
14500tons oil fuel