Dohai-Class Battleship [1910] (Seondok)

Dohai-Class, Seondok County Battleship laid down 1910

Displacement:
	20,394 t light; 21,500 t standard; 22,800 t normal; 23,840 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(603.67 ft / 590.55 ft) x 85.30 ft x (25.92 / 26.90 ft)
	(184.00 m / 180.00 m) x 26.00 m  x (7.90 / 8.20 m)

Armament:
      10 - 12.20" / 310 mm 47.0 cal guns - 945.54lbs / 428.89kg shells, 100 per gun
	  Breech loading guns in turret on barbette mounts, 1904 Model
	  5 x Twin mounts on centreline, evenly spread
		2 raised mounts
      18 - 4.33" / 110 mm 45.0 cal guns - 40.96lbs / 18.58kg shells, 300 per gun
	  Quick firing guns in casemate mounts, 1904 Model
	  18 x Single mounts on sides, evenly spread
		18 hull mounts in casemates- Limited use in heavy seas
      18 - 0.98" / 25.0 mm 55.0 cal guns - 0.51lbs / 0.23kg shells, 400 per gun
	  Quick firing guns in deck mounts, 1901 Model
	  18 x Single mounts on sides, evenly spread
		18 raised mounts
      Weight of broadside 10,202 lbs / 4,627 kg
      Main Torpedoes
      4 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 2.143 t each, 8.572 t total
	In 4 sets of deck mounted side rotating tubes
      2nd Torpedoes
      8 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 2.143 t each, 17.145 t total
	below water reloads

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	12.2" / 310 mm	347.77 ft / 106.00 m	11.09 ft / 3.38 m
	Ends:	3.94" / 100 mm	242.78 ft / 74.00 m	11.09 ft / 3.38 m
	Upper:	5.91" / 150 mm	347.77 ft / 106.00 m	8.01 ft / 2.44 m
	  Main Belt covers 91 % of normal length

   - Torpedo Bulkhead - Strengthened structural bulkheads:
		1.97" / 50 mm	347.77 ft / 106.00 m	24.54 ft / 7.48 m
	Beam between torpedo bulkheads 59.06 ft / 18.00 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	13.8" / 350 mm	7.87" / 200 mm		12.2" / 310 mm
	2nd:	3.94" / 100 mm	1.97" / 50 mm		3.94" / 100 mm

   - Armoured deck - multiple decks:
	For and Aft decks: 3.94" / 100 mm
	Forecastle: 2.95" / 75 mm  Quarter deck: 2.95" / 75 mm

   - Conning towers: Forward 11.81" / 300 mm, Aft 0.00" / 0 mm

Machinery:
	Coal and oil fired boilers, steam turbines,
	Direct drive, 4 shafts, 38,322 shp / 28,588 Kw = 22.50 kts
	Range 7,500nm at 10.00 kts
	Bunker at max displacement = 2,340 tons (50% coal)

Complement:
	927 - 1,206

Cost:
	£1.904 million / $7.617 million

Distribution of weights at normal displacement:
	Armament: 1,919 tons, 8.4 %
	   - Guns: 1,880 tons, 8.2 %
	   - Weapons: 39 tons, 0.2 %
	Armour: 9,236 tons, 40.5 %
	   - Belts: 3,199 tons, 14.0 %
	   - Torpedo bulkhead: 622 tons, 2.7 %
	   - Armament: 2,605 tons, 11.4 %
	   - Armour Deck: 2,606 tons, 11.4 %
	   - Conning Tower: 205 tons, 0.9 %
	Machinery: 1,659 tons, 7.3 %
	Hull, fittings & equipment: 7,480 tons, 32.8 %
	Fuel, ammunition & stores: 2,406 tons, 10.6 %
	Miscellaneous weights: 100 tons, 0.4 %
	   - Above deck: 100 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  36,828 lbs / 16,705 Kg = 40.5 x 12.2 " / 310 mm shells or 3.9 torpedoes
	Stability (Unstable if below 1.00): 1.07
	Metacentric height 4.5 ft / 1.4 m
	Roll period: 16.8 seconds
	Steadiness	- As gun platform (Average = 50 %): 76 %
			- Recoil effect (Restricted arc if above 1.00): 0.91
	Seaboat quality  (Average = 1.00): 1.51

Hull form characteristics:
	Hull has a flush deck,
	  a ram bow and a cruiser stern
	Block coefficient (normal/deep): 0.611 / 0.616
	Length to Beam Ratio: 6.92 : 1
	'Natural speed' for length: 24.30 kts
	Power going to wave formation at top speed: 46 %
	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,  19.69 ft / 6.00 m
	   - Aft deck:	35.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
	   - Quarter deck:	15.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
	   - Average freeboard:		21.10 ft / 6.43 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 90.5 %
		- Above water (accommodation/working, high = better): 152.7 %
	Waterplane Area: 37,230 Square feet or 3,459 Square metres
	Displacement factor (Displacement / loading): 105 %
	Structure weight / hull surface area: 166 lbs/sq ft or 813 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.96
		- Longitudinal: 1.49
		- Overall: 1.00
	Adequate machinery, storage, compartmentation space
	Excellent 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