Geoje - Class, Chosen Frigate / Corvette laid down 1942
Displacement:
805 t light; 831 t standard; 901 t normal; 956 t full load
Dimensions: Length overall / water x beam x draught
235,30 ft / 225,39 ft x 29,86 ft x 11,15 ft (normal load)
71,72 m / 68,70 m x 9,10 m x 3,40 m
Armament:
4 - 2,99" / 76,0 mm guns (2x2 guns), 13,39lbs / 6,07kg shells, 1942 Model
Dual purpose guns in deck mounts
on centreline ends, evenly spread
2 - 0,50" / 12,7 mm guns in single mounts, 0,06lbs / 0,03kg shells, 1942 Model
Machine guns in deck mounts
on side, all amidships
4 - 0,79" / 20,0 mm guns (1x4 guns), 0,24lbs / 0,11kg shells, 1942 Model
Anti-aircraft guns in deck mount
on centreline aft, all raised guns - superfiring
8 - 0,79" / 20,0 mm guns (2x4 guns), 0,24lbs / 0,11kg shells, 1942 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 57 lbs / 26 kg
Shells per gun, main battery: 250
4 - 21,0" / 533 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1,38" / 35 mm 0,59" / 15 mm -
2nd: 0,39" / 10 mm 0,39" / 10 mm -
3rd: 0,39" / 10 mm 0,39" / 10 mm -
- Conning tower: 1,57" / 40 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 21.127 shp / 15.761 Kw = 30,80 kts
Range 4.500nm at 12,00 kts
Bunker at max displacement = 125 tons
Complement:
81 - 106
Cost:
£0,600 million / $2,402 million
Distribution of weights at normal displacement:
Armament: 7 tons, 0,8%
Armour: 10 tons, 1,1%
- Belts: 0 tons, 0,0%
- Torpedo bulkhead: 0 tons, 0,0%
- Armament: 7 tons, 0,7%
- Armour Deck: 0 tons, 0,0%
- Conning Tower: 3 tons, 0,4%
Machinery: 430 tons, 47,8%
Hull, fittings & equipment: 308 tons, 34,2%
Fuel, ammunition & stores: 96 tons, 10,6%
Miscellaneous weights: 50 tons, 5,6%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
364 lbs / 165 Kg = 27,2 x 3,0 " / 76 mm shells or 0,3 torpedoes
Stability (Unstable if below 1.00): 1,17
Metacentric height 1,1 ft / 0,3 m
Roll period: 12,0 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0,09
Seaboat quality (Average = 1.00): 0,90
Hull form characteristics:
Hull has raised forecastle, rise forward of midbreak, low quarterdeck
and transom stern
Block coefficient: 0,420
Length to Beam Ratio: 7,55 : 1
'Natural speed' for length: 17,75 kts
Power going to wave formation at top speed: 77 %
Trim (Max stability = 0, Max steadiness = 100): 55
Bow angle (Positive = bow angles forward): 20,00 degrees
Stern overhang: 2,62 ft / 0,80 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 20,01 ft / 6,10 m
- Forecastle (20%): 18,37 ft / 5,60 m (17,39 ft / 5,30 m aft of break)
- Mid (50%): 15,75 ft / 4,80 m (14,76 ft / 4,50 m aft of break)
- Quarterdeck (15%): 13,12 ft / 4,00 m (13,78 ft / 4,20 m before break)
- Stern: 13,12 ft / 4,00 m
- Average freeboard: 15,74 ft / 4,80 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 166,8%
- Above water (accommodation/working, high = better): 92,8%
Waterplane Area: 4.355 Square feet or 405 Square metres
Displacement factor (Displacement / loading): 74%
Structure weight / hull surface area: 30 lbs/sq ft or 148 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,51
- Longitudinal: 7,42
- Overall: 0,67
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather