Ii-Jongcha-Class Battlecruiser [1907] (Seondok)

Ii-Jongcha, Seondok County Battlecruiser laid down 1907

Displacement:
	12,292 t light; 13,000 t standard; 13,883 t normal; 14,589 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(521.65 ft / 508.53 ft) x 72.18 ft x (26.25 / 27.25 ft)
	(159.00 m / 155.00 m) x 22.00 m  x (8.00 / 8.31 m)

Armament:
      10 - 7.87" / 200 mm 50.0 cal guns - 258.40lbs / 117.21kg shells, 175 per gun
	  Breech loading guns in turret on barbette mounts, 1900 Model
	  3 x Twin mounts on centreline, evenly spread
	  2 x Twin mounts on sides amidships
      32 - 3.44" / 87.5 mm 40.0 cal guns - 19.60lbs / 8.89kg shells, 500 per gun
	  Quick firing guns in casemate mounts, 1894 Model
	  32 x Single mounts on sides, evenly spread
		20 hull mounts in casemates- Limited use in heavy seas
      8 - 0.98" / 25.0 mm 55.0 cal guns - 0.51lbs / 0.23kg shells, 2,000 per gun
	  Quick firing guns in deck mounts, 1901 Model
	  8 x Single mounts on centreline, evenly spread
		8 double raised mounts
      Weight of broadside 3,215 lbs / 1,458 kg
      Main Torpedoes
      4 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 2.131 t each, 8.524 t total
	submerged bow & stern tubes
      2nd Torpedoes
      12 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 2.131 t each, 25.573 t total
	below water reloads

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	7.87" / 200 mm	416.67 ft / 127.00 m	10.20 ft / 3.11 m
	Ends:	3.94" / 100 mm	  91.86 ft / 28.00 m	10.20 ft / 3.11 m
	Upper:	5.91" / 150 mm	416.67 ft / 127.00 m	8.01 ft / 2.44 m
	  Main Belt covers 126 % of normal length
	  Main Belt inclined 5.00 degrees (positive = in)

   - Torpedo Bulkhead - Strengthened structural bulkheads:
		1.97" / 50 mm	416.67 ft / 127.00 m	23.26 ft / 7.09 m
	Beam between torpedo bulkheads 52.49 ft / 16.00 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	8.86" / 225 mm	5.91" / 150 mm		7.87" / 200 mm
	2nd:	2.95" / 75 mm	0.98" / 25 mm		      -
	3rd:	0.98" / 25 mm	      -			      -

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

   - Conning towers: Forward 7.87" / 200 mm, Aft 0.00" / 0 mm

Machinery:
	Coal fired boilers, steam turbines,
	Direct drive, 4 shafts, 46,223 shp / 34,482 Kw = 25.50 kts
	Range 5,000nm at 10.00 kts
	Bunker at max displacement = 1,590 tons (100% coal)

Complement:
	639 - 831

Cost:
	£1.132 million / $4.528 million

Distribution of weights at normal displacement:
	Armament: 797 tons, 5.7 %
	   - Guns: 748 tons, 5.4 %
	   - Weapons: 49 tons, 0.4 %
	Armour: 5,091 tons, 36.7 %
	   - Belts: 2,297 tons, 16.5 %
	   - Torpedo bulkhead: 706 tons, 5.1 %
	   - Armament: 1,089 tons, 7.8 %
	   - Armour Deck: 901 tons, 6.5 %
	   - Conning Tower: 98 tons, 0.7 %
	Machinery: 2,889 tons, 20.8 %
	Hull, fittings & equipment: 3,415 tons, 24.6 %
	Fuel, ammunition & stores: 1,591 tons, 11.5 %
	Miscellaneous weights: 100 tons, 0.7 %
	   - Above deck: 100 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  16,422 lbs / 7,449 Kg = 67.3 x 7.9 " / 200 mm shells or 1.6 torpedoes
	Stability (Unstable if below 1.00): 1.22
	Metacentric height 4.4 ft / 1.3 m
	Roll period: 14.4 seconds
	Steadiness	- As gun platform (Average = 50 %): 67 %
			- Recoil effect (Restricted arc if above 1.00): 0.36
	Seaboat quality  (Average = 1.00): 1.34

Hull form characteristics:
	Hull has a flush deck,
	  a ram bow and a cruiser stern
	Block coefficient (normal/deep): 0.504 / 0.510
	Length to Beam Ratio: 7.05 : 1
	'Natural speed' for length: 22.55 kts
	Power going to wave formation at top speed: 54 %
	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:	20.00 %,  26.25 ft / 8.00 m,  22.97 ft / 7.00 m
	   - Forward deck:	30.00 %,  22.97 ft / 7.00 m,  18.04 ft / 5.50 m
	   - Aft deck:	35.00 %,  18.04 ft / 5.50 m,  18.04 ft / 5.50 m
	   - Quarter deck:	15.00 %,  18.04 ft / 5.50 m,  18.04 ft / 5.50 m
	   - Average freeboard:		20.03 ft / 6.11 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 125.8 %
		- Above water (accommodation/working, high = better): 140.4 %
	Waterplane Area: 24,553 Square feet or 2,281 Square metres
	Displacement factor (Displacement / loading): 101 %
	Structure weight / hull surface area: 117 lbs/sq ft or 573 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.93
		- Longitudinal: 1.85
		- Overall: 1.00
	Cramped machinery, storage, compartmentation space
	Excellent accommodation and workspace room
	Good seaboat, rides out heavy weather easily