Yaeya-Class Battleship [1897] (Seondok)

Yaeya-Class, Seondok County Battleship laid down 1897

Displacement:
	12,139 t light; 12,700 t standard; 13,576 t normal; 14,277 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(406.00 ft / 400.00 ft) x 80.00 ft x (27.00 / 28.10 ft)
	(123.75 m / 121.92 m) x 24.38 m  x (8.23 / 8.56 m)

Armament:
      4 - 12.00" / 305 mm 42.0 cal guns - 837.76lbs / 380.00kg shells, 80 per gun
	  Breech loading guns in turret on barbette mounts, 1896 Model
	  2 x Twin mounts on centreline, evenly spread
      12 - 5.33" / 135 mm 40.0 cal guns - 72.56lbs / 32.91kg shells, 150 per gun
	  Quick firing guns in casemate mounts, 1891 Model
	  12 x Single mounts on sides, evenly spread
		12 hull mounts in casemates- Limited use in all but light seas
      12 - 4.50" / 114 mm 45.0 cal guns - 45.95lbs / 20.84kg shells, 150 per gun
	  Quick firing guns in casemate mounts, 1892 Model
	  12 x Single mounts on sides, evenly spread
      12 - 3.00" / 76.2 mm 40.0 cal guns - 12.94lbs / 5.87kg shells, 200 per gun
	  Quick firing guns in deck mounts, 1892 Model
	  12 x Single mounts on sides, evenly spread
		12 raised mounts
      12 - 1.50" / 38.1 mm 40.0 cal guns - 1.59lbs / 0.72kg shells, 500 per gun
	  Quick firing guns in deck mounts, 1888 Model
	  12 x Single mounts on sides, evenly spread
      Weight of broadside 4,948 lbs / 2,244 kg

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	10.0" / 254 mm	304.00 ft / 92.66 m	10.73 ft / 3.27 m
	Ends:	6.00" / 152 mm	  95.98 ft / 29.25 m	10.73 ft / 3.27 m
	Upper:	6.00" / 152 mm	304.00 ft / 92.66 m	8.00 ft / 2.44 m
	  Main Belt covers 117 % of normal length
	  Main Belt inclined 10.00 degrees (positive = in)

   - Torpedo Bulkhead - Strengthened structural bulkheads:
		2.00" / 51 mm	304.00 ft / 92.66 m	24.78 ft / 7.55 m
	Beam between torpedo bulkheads 72.00 ft / 21.95 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	10.0" / 254 mm	8.00" / 203 mm		13.5" / 343 mm
	2nd:	4.00" / 102 mm	1.00" / 25 mm		4.00" / 102 mm
	3rd:	3.00" / 76 mm	1.00" / 25 mm		3.00" / 76 mm
	4th:	1.00" / 25 mm	      -			      -
	5th:	1.00" / 25 mm	      -			      -

   - Armoured deck - multiple decks:
	For and Aft decks: 2.00" / 51 mm
	Forecastle: 1.50" / 38 mm  Quarter deck: 1.50" / 38 mm

   - Conning towers: Forward 13.00" / 330 mm, Aft 0.00" / 0 mm

Machinery:
	Coal fired boilers, complex reciprocating steam engines,
	Direct drive, 2 shafts, 20,193 ihp / 15,064 Kw = 20.00 kts
	Range 5,000nm at 10.00 kts
	Bunker at max displacement = 1,576 tons (100% coal)

Complement:
	628 - 817

Cost:
	£1.251 million / $5.006 million

Distribution of weights at normal displacement:
	Armament: 817 tons, 6.0 %
	   - Guns: 817 tons, 6.0 %
	Armour: 4,771 tons, 35.1 %
	   - Belts: 2,274 tons, 16.8 %
	   - Torpedo bulkhead: 557 tons, 4.1 %
	   - Armament: 969 tons, 7.1 %
	   - Armour Deck: 811 tons, 6.0 %
	   - Conning Tower: 159 tons, 1.2 %
	Machinery: 3,310 tons, 24.4 %
	Hull, fittings & equipment: 3,141 tons, 23.1 %
	Fuel, ammunition & stores: 1,437 tons, 10.6 %
	Miscellaneous weights: 100 tons, 0.7 %
	   - Above deck: 100 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  12,857 lbs / 5,832 Kg = 14.9 x 12.0 " / 305 mm shells or 2.3 torpedoes
	Stability (Unstable if below 1.00): 1.50
	Metacentric height 7.2 ft / 2.2 m
	Roll period: 12.6 seconds
	Steadiness	- As gun platform (Average = 50 %): 63 %
			- Recoil effect (Restricted arc if above 1.00): 0.22
	Seaboat quality  (Average = 1.00): 1.26

Hull form characteristics:
	Hull has a flush deck,
	  a ram bow and a cruiser stern
	Block coefficient (normal/deep): 0.550 / 0.556
	Length to Beam Ratio: 5.00 : 1
	'Natural speed' for length: 20.00 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: -2.00 ft / -0.61 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	14.00 %,  18.00 ft / 5.49 m,  16.00 ft / 4.88 m
	   - Forward deck:	30.00 %,  16.00 ft / 4.88 m,  14.00 ft / 4.27 m
	   - Aft deck:	46.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
	   - Quarter deck:	10.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
	   - Average freeboard:		14.69 ft / 4.48 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 115.4 %
		- Above water (accommodation/working, high = better): 97.5 %
	Waterplane Area: 22,332 Square feet or 2,075 Square metres
	Displacement factor (Displacement / loading): 91 %
	Structure weight / hull surface area: 131 lbs/sq ft or 637 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.91
		- Longitudinal: 2.23
		- Overall: 1.00
	Cramped machinery, storage, compartmentation space
	Adequate accommodation and workspace room
	Good seaboat, rides out heavy weather easily