Bujoghan-Class Battleship [1907] (Seondok)

Bujoghan-Class, Seondok County Battleship laid down 1907

Displacement:
	14,954 t light; 15,750 t standard; 17,199 t normal; 18,358 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(477.33 ft / 475.72 ft) x 85.30 ft x (26.25 / 27.66 ft)
	(145.49 m / 145.00 m) x 26.00 m  x (8.00 / 8.43 m)

Armament:
      6 - 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
	  3 x Twin mounts on centreline, evenly spread
      20 - 4.33" / 110 mm 45.0 cal guns - 40.96lbs / 18.58kg shells, 300 per gun
	  Breech loading guns in casemate mounts, 1904 Model
	  20 x Single mounts on sides, evenly spread
		12 hull mounts in casemates- Limited use in heavy seas
      8 - 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
	  8 x Single mounts on sides, evenly spread
		8 raised mounts
      Weight of broadside 6,496 lbs / 2,947 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
      8 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 2.131 t each, 17.049 t total
	below water reloads

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	13.8" / 350 mm	334.65 ft / 102.00 m	11.09 ft / 3.38 m
	Ends:	4.72" / 120 mm	141.08 ft / 43.00 m	11.09 ft / 3.38 m
	Upper:	6.30" / 160 mm	334.65 ft / 102.00 m	8.01 ft / 2.44 m
	  Main Belt covers 108 % of normal length

   - Torpedo Bulkhead - Strengthened structural bulkheads:
		2.95" / 75 mm	334.65 ft / 102.00 m	24.31 ft / 7.41 m
	Beam between torpedo bulkheads 59.06 ft / 18.00 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	11.8" / 300 mm	7.87" / 200 mm		10.8" / 275 mm
	2nd:	2.95" / 75 mm	0.98" / 25 mm		2.95" / 75 mm

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

   - Conning towers: Forward 12.20" / 310 mm, Aft 0.00" / 0 mm

Machinery:
	Coal fired boilers, steam turbines,
	Direct drive, 2 shafts, 34,828 shp / 25,981 Kw = 22.50 kts
	Range 7,500nm at 10.00 kts
	Bunker at max displacement = 2,608 tons (100% coal)

Complement:
	750 - 976

Cost:
	£1.421 million / $5.684 million

Distribution of weights at normal displacement:
	Armament: 1,215 tons, 7.1 %
	   - Guns: 1,177 tons, 6.8 %
	   - Weapons: 38 tons, 0.2 %
	Armour: 7,105 tons, 41.3 %
	   - Belts: 3,240 tons, 18.8 %
	   - Torpedo bulkhead: 889 tons, 5.2 %
	   - Armament: 1,219 tons, 7.1 %
	   - Armour Deck: 1,582 tons, 9.2 %
	   - Conning Tower: 175 tons, 1.0 %
	Machinery: 2,177 tons, 12.7 %
	Hull, fittings & equipment: 4,356 tons, 25.3 %
	Fuel, ammunition & stores: 2,245 tons, 13.1 %
	Miscellaneous weights: 100 tons, 0.6 %
	   - Above deck: 100 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  24,507 lbs / 11,116 Kg = 27.0 x 12.2 " / 310 mm shells or 2.8 torpedoes
	Stability (Unstable if below 1.00): 1.36
	Metacentric height 6.8 ft / 2.1 m
	Roll period: 13.7 seconds
	Steadiness	- As gun platform (Average = 50 %): 62 %
			- Recoil effect (Restricted arc if above 1.00): 0.33
	Seaboat quality  (Average = 1.00): 1.25

Hull form characteristics:
	Hull has a flush deck,
	  a normal bow and a cruiser stern
	Block coefficient (normal/deep): 0.565 / 0.572
	Length to Beam Ratio: 5.58 : 1
	'Natural speed' for length: 21.81 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:	15.00 %,  22.97 ft / 7.00 m,  19.69 ft / 6.00 m
	   - Forward deck:	35.00 %,  19.69 ft / 6.00 m,  16.40 ft / 5.00 m
	   - Aft deck:	35.00 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
	   - Quarter deck:	15.00 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
	   - Average freeboard:		17.67 ft / 5.39 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 107.8 %
		- Above water (accommodation/working, high = better): 125.7 %
	Waterplane Area: 28,726 Square feet or 2,669 Square metres
	Displacement factor (Displacement / loading): 100 %
	Structure weight / hull surface area: 143 lbs/sq ft or 697 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.93
		- Longitudinal: 1.89
		- Overall: 1.00
	Adequate machinery, storage, compartmentation space
	Excellent accommodation and workspace room
	Good seaboat, rides out heavy weather easily