Hong Koma-Class Coastal Battleship [1892] (Seondok)

Hong Ko'ma-Class, Seondok County Coastal Battleship laid down 1892

Displacement:
	8,426 t light; 9,000 t standard; 9,795 t normal; 10,431 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(347.77 ft / 344.49 ft) x 72.18 ft x (21.33 / 22.50 ft)
	(106.00 m / 105.00 m) x 22.00 m  x (6.50 / 6.86 m)

Armament:
      4 - 10.43" / 265 mm 40.0 cal guns - 580.26lbs / 263.20kg shells, 100 per gun
	  Breech loading guns in turret on barbette mounts, 1890 Model
	  2 x Twin mounts on centreline, evenly spread
      4 - 9.84" / 250 mm 42.5 cal guns - 481.93lbs / 218.60kg shells, 120 per gun
	  Breech loading guns in deck and hoist mounts, 1891 Model
	  2 x Twin mounts on sides amidships
      8 - 6.10" / 155 mm 40.0 cal guns - 108.91lbs / 49.40kg shells, 150 per gun
	  Quick firing guns in casemate mounts, 1890 Model
	  8 x Single mounts on sides, evenly spread
      8 - 3.70" / 94.0 mm 35.0 cal guns - 23.76lbs / 10.78kg shells, 300 per gun
	  Quick firing guns in deck mounts, 1892 Model
	  8 x Single mounts on sides, evenly spread
		8 raised mounts
      16 - 1.77" / 45.0 mm 20.0 cal guns - 2.49lbs / 1.13kg shells, 750 per gun
	  Quick firing guns in deck mounts, 1894 Model
	  16 x Single mounts on centreline, evenly spread
		16 double raised mounts
      Weight of broadside 5,350 lbs / 2,427 kg
      Main Torpedoes
      4 - 19.7" / 500 mm, 9.84 ft / 3.00 m torpedoes - 0.328 t each, 1.311 t total
	In 4 sets of deck mounted carriage/fixed tubes
      2nd Torpedoes
      4 - 21.7" / 550 mm, 9.84 ft / 3.00 m torpedoes - 0.395 t each, 1.579 t total
	In 1 sets of deck mounted carriage/fixed tubes

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	9.84" / 250 mm	230.81 ft / 70.35 m	10.20 ft / 3.11 m
	Ends:	2.95" / 75 mm	113.65 ft / 34.64 m	10.20 ft / 3.11 m
	Upper:	4.92" / 125 mm	230.81 ft / 70.35 m	8.01 ft / 2.44 m
	  Main Belt covers 103 % of normal length

   - Torpedo Bulkhead - Strengthened structural bulkheads:
		1.97" / 50 mm	230.81 ft / 70.35 m	20.44 ft / 6.23 m
	Beam between torpedo bulkheads 59.06 ft / 18.00 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	7.09" / 180 mm	3.94" / 100 mm		5.91" / 150 mm
	2nd:	7.09" / 180 mm	3.94" / 100 mm		5.91" / 150 mm
	3rd:	1.97" / 50 mm	0.98" / 25 mm		      -
	4th:	0.98" / 25 mm	      -			      -

   - Armoured deck - multiple decks:
	For and Aft decks: 1.97" / 50 mm
	Forecastle: 1.57" / 40 mm  Quarter deck: 1.57" / 40 mm

   - Conning towers: Forward 12.99" / 330 mm, Aft 3.94" / 100 mm

Machinery:
	Coal fired boilers, complex reciprocating steam engines,
	Direct drive, 2 shafts, 7,608 ihp / 5,675 Kw = 16.00 kts
	Range 5,000nm at 10.00 kts
	Bunker at max displacement = 1,430 tons (100% coal)

Complement:
	491 - 639

Cost:
	£0.875 million / $3.498 million

Distribution of weights at normal displacement:
	Armament: 886 tons, 9.0 %
	   - Guns: 883 tons, 9.0 %
	   - Weapons: 4 tons, 0.0 %
	Armour: 3,253 tons, 33.2 %
	   - Belts: 1,608 tons, 16.4 %
	   - Torpedo bulkhead: 344 tons, 3.5 %
	   - Armament: 462 tons, 4.7 %
	   - Armour Deck: 673 tons, 6.9 %
	   - Conning Towers: 167 tons, 1.7 %
	Machinery: 1,358 tons, 13.9 %
	Hull, fittings & equipment: 2,828 tons, 28.9 %
	Fuel, ammunition & stores: 1,369 tons, 14.0 %
	Miscellaneous weights: 100 tons, 1.0 %
	   - Above deck: 100 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  12,571 lbs / 5,702 Kg = 22.1 x 10.4 " / 265 mm shells or 10.1 torpedoes
	Stability (Unstable if below 1.00): 1.44
	Metacentric height 5.8 ft / 1.8 m
	Roll period: 12.6 seconds
	Steadiness	- As gun platform (Average = 50 %): 85 %
			- Recoil effect (Restricted arc if above 1.00): 0.48
	Seaboat quality  (Average = 1.00): 1.69

Hull form characteristics:
	Hull has a flush deck,
	  a ram bow and a cruiser stern
	Block coefficient (normal/deep): 0.647 / 0.653
	Length to Beam Ratio: 4.77 : 1
	'Natural speed' for length: 18.56 kts
	Power going to wave formation at top speed: 48 %
	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:	18.00 %,  18.04 ft / 5.50 m,  16.40 ft / 5.00 m
	   - Forward deck:	30.00 %,  16.40 ft / 5.00 m,  13.12 ft / 4.00 m
	   - Aft deck:	37.00 %,  13.12 ft / 4.00 m,  13.12 ft / 4.00 m
	   - Quarter deck:	15.00 %,  13.12 ft / 4.00 m,  13.12 ft / 4.00 m
	   - Average freeboard:		14.32 ft / 4.37 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 101.1 %
		- Above water (accommodation/working, high = better): 101.3 %
	Waterplane Area: 18,987 Square feet or 1,764 Square metres
	Displacement factor (Displacement / loading): 100 %
	Structure weight / hull surface area: 140 lbs/sq ft or 684 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.90
		- Longitudinal: 2.55
		- Overall: 1.00
	Adequate machinery, storage, compartmentation space
	Adequate 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