Jeonsa-Class Battlecruiser [1912] (Seondok)

Jeonsa-Class, Seondok County Battlecruiser laid down 1912

Displacement:
	27,007 t light; 28,500 t standard; 30,260 t normal; 31,668 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(662.73 ft / 656.17 ft) x 98.43 ft x (32.81 / 33.95 ft)
	(202.00 m / 200.00 m) x 30.00 m  x (10.00 / 10.35 m)

Armament:
      8 - 14.96" / 380 mm 40.0 cal guns - 1,688.52lbs / 765.90kg shells, 100 per gun
	  Breech loading guns in turret on barbette mounts, 1912 Model
	  4 x Twin mounts on centreline ends, evenly spread
		2 raised mounts - superfiring
      20 - 4.33" / 110 mm 45.0 cal guns - 40.96lbs / 18.58kg shells, 300 per gun
	  Quick firing guns in casemate mounts, 1904 Model
	  20 x Single mounts on sides, evenly spread
      8 - 0.98" / 25.0 mm 55.0 cal guns - 0.51lbs / 0.23kg shells, 500 per gun
	  Quick firing guns in deck mounts, 1901 Model
	  8 x Single mounts on sides, evenly spread
		8 raised mounts
      Weight of broadside 14,331 lbs / 6,501 kg
      Main Torpedoes
      4 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 2.151 t each, 8.604 t total
	submerged bow & stern tubes
      2nd Torpedoes
      8 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 2.151 t each, 17.209 t total
	below water reloads

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	9.45" / 240 mm	459.32 ft / 140.00 m	11.91 ft / 3.63 m
	Ends:	2.95" / 75 mm	196.82 ft / 59.99 m	11.91 ft / 3.63 m
	Upper:	3.94" / 100 mm	459.32 ft / 140.00 m	8.01 ft / 2.44 m
	  Main Belt covers 108 % of normal length

   - Torpedo Bulkhead - Strengthened structural bulkheads:
		2.95" / 75 mm	459.32 ft / 140.00 m	28.87 ft / 8.80 m
	Beam between torpedo bulkheads 72.18 ft / 22.00 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	14.2" / 360 mm	9.84" / 250 mm		9.84" / 250 mm
	2nd:	3.94" / 100 mm	1.97" / 50 mm		3.94" / 100 mm

   - Armoured deck - multiple decks:
	For and Aft decks: 2.95" / 75 mm
	Forecastle: 1.97" / 50 mm  Quarter deck: 1.97" / 50 mm

   - Conning towers: Forward 13.78" / 350 mm, Aft 0.00" / 0 mm

Machinery:
	Oil fired boilers, steam turbines,
	Geared drive, 4 shafts, 98,958 shp / 73,823 Kw = 28.00 kts
	Range 7,500nm at 12.00 kts
	Bunker at max displacement = 3,167 tons

Complement:
	1,146 - 1,491

Cost:
	£2.601 million / $10.405 million

Distribution of weights at normal displacement:
	Armament: 2,080 tons, 6.9 %
	   - Guns: 2,041 tons, 6.7 %
	   - Weapons: 39 tons, 0.1 %
	Armour: 10,065 tons, 33.3 %
	   - Belts: 3,055 tons, 10.1 %
	   - Torpedo bulkhead: 1,449 tons, 4.8 %
	   - Armament: 3,024 tons, 10.0 %
	   - Armour Deck: 2,249 tons, 7.4 %
	   - Conning Tower: 288 tons, 1.0 %
	Machinery: 3,946 tons, 13.0 %
	Hull, fittings & equipment: 10,817 tons, 35.7 %
	Fuel, ammunition & stores: 3,253 tons, 10.7 %
	Miscellaneous weights: 100 tons, 0.3 %
	   - Above deck: 100 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  40,836 lbs / 18,523 Kg = 24.4 x 15.0 " / 380 mm shells or 4.0 torpedoes
	Stability (Unstable if below 1.00): 1.09
	Metacentric height 5.8 ft / 1.8 m
	Roll period: 17.2 seconds
	Steadiness	- As gun platform (Average = 50 %): 65 %
			- Recoil effect (Restricted arc if above 1.00): 0.86
	Seaboat quality  (Average = 1.00): 1.29

Hull form characteristics:
	Hull has a flush deck,
	  a ram bow and a cruiser stern
	Block coefficient (normal/deep): 0.500 / 0.505
	Length to Beam Ratio: 6.67 : 1
	'Natural speed' for length: 25.62 kts
	Power going to wave formation at top speed: 53 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): -4.00 degrees
	Stern overhang: -3.28 ft / -1.00 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	15.00 %,  34.45 ft / 10.50 m,  29.53 ft / 9.00 m
	   - Forward deck:	35.00 %,  29.53 ft / 9.00 m,  22.97 ft / 7.00 m
	   - Aft deck:	35.00 %,  22.97 ft / 7.00 m,  22.97 ft / 7.00 m
	   - Quarter deck:	15.00 %,  22.97 ft / 7.00 m,  22.97 ft / 7.00 m
	   - Average freeboard:		25.39 ft / 7.74 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 105.3 %
		- Above water (accommodation/working, high = better): 176.0 %
	Waterplane Area: 43,024 Square feet or 3,997 Square metres
	Displacement factor (Displacement / loading): 106 %
	Structure weight / hull surface area: 200 lbs/sq ft or 978 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.92
		- Longitudinal: 2.04
		- Overall: 1.00
	Adequate machinery, storage, compartmentation space
	Excellent accommodation and workspace room
	Good seaboat, rides out heavy weather easily