Wonsan, South Korea auxiliary minelayer laid down 1945, launched 1947,
completed 1950 (engine 1941)
Displacement:
3 086 t light; 3224
t standard; 5 200 t normal; 5 501 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(311,67 ft / 289,70 ft)
x 43,96 ft x (19,36 / 20,36 ft)
(95,00 m / 88,30 m) x
13,40 m x (5,90 / 6,21 m)
Armament:
2 - 5,00" / 127 mm 40,0
cal guns - 51,70lbs / 23,45kg shells, 250 per gun
Dual purpose guns in deck mount, 1929 Model
1 x Single mount on centreline, aft deck aft
24 - 0,98" / 25,0 mm
60,0 cal guns - 0,57lbs / 0,26kg shells, 2 500 per gun
Anti-air guns in deck mounts, 1936 Model
6 x Triple mounts on sides, evenly spread
6 raised
mounts
2 x Triple mounts on centreline ends, evenly
spread
2 raised
mounts
Weight of broadside 112 lbs
/ 51 kg
Mines
2 - 2 548,54 lbs /
1 156,00 kg mines + 400 reloads - 457,373 t total
in Above water - Stern
racks/rails
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist
(max)
Main: 0,51" / 13 mm -
-
Machinery:
Diesel Internal
combustion motors,
Geared drive, 1 shaft,
4 400 shp / 3 282 Kw = 15,66 kts
Range 12 000nm at
10,00 kts
Bunker normal = 377
tons, at max displacement = 679 tons
Complement:
306 - 398
Cost:
£1,291 million / $5,166
million
Distribution of weights at normal displacement:
Armament: 595 tons,
11,4%
- Guns: 23 tons, 0,4%
- Weapons: 572 tons, 11,0%
Armour: 1 tons, 0,0%
- Armament: 1 tons, 0,0%
Machinery: 116 tons,
2,2%
Hull, fittings &
equipment: 2 334 tons, 44,9%
Fuel, ammunition &
stores: 515 tons, 9,9%
Miscellaneous weights:
1 639 tons, 31,5%
- Hull below water: 1 066 tons
- Hull above water: 533 tons
- On freeboard deck: 40 tons
Overall survivability and seakeeping ability:
Survivability
(Non-critical penetrating hits needed to sink ship):
5 055 lbs / 2 293 Kg = 80,9 x 5,0 " /
127 mm shells or 1,2 torpedoes
Stability (Unstable if
below 1.00): 1,36
Metacentric height 2,5
ft / 0,8 m
Roll period: 11,6
seconds
Steadiness - As gun platform (Average = 50 %): 80 %
-
Recoil effect (Restricted arc if above 1.00): 0,03
Seaboat quality (Average = 1.00): 2,00
Hull form characteristics:
Hull has raised
forecastle, raised quarterdeck,
a normal bow and a small transom stern
Block coefficient
(normal/deep): 0,738 / 0,743
Length to Beam Ratio:
6,59 : 1
'Natural speed' for
length: 17,02 kts
Power going to wave
formation at top speed: 48 %
Trim (Max stability =
0, Max steadiness = 100): 40
Bow angle (Positive =
bow angles forward): 25,50 degrees
Stern overhang: 11,48
ft / 3,50 m
Freeboard (% = length
of deck as a percentage of waterline length):
Fore
end, Aft end
- Forecastle: 14,00%, 21,98 ft /
6,70 m, 20,01 ft / 6,10 m
- Forward deck: 36,00%, 12,14 ft / 3,70
m, 12,14 ft / 3,70 m
- Aft deck: 16,00%, 12,14 ft / 3,70 m, 12,14 ft / 3,70 m
- Quarter deck: 34,00%, 20,01 ft /
6,10 m, 20,01 ft / 6,10 m
- Average freeboard: 16,03 ft / 4,89 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low =
better): 43,7%
- Above
water (accommodation/working, high = better): 79,7%
Waterplane Area:
10 543 Square feet or 979 Square metres
Displacement factor
(Displacement / loading): 269%
Structure weight / hull
surface area: 133 lbs/sq ft or 648 Kg/sq metre
Hull strength
(Relative):
-
Cross-sectional: 2,10
-
Longitudinal: 6,22
- Overall:
2,34
Excellent machinery,
storage, compartmentation space
Cramped accommodation
and workspace room
Ship has slow, easy
roll, a good, steady gun platform
Excellent seaboat,
comfortable, can fire her guns in the heaviest weather