Heonson-Class Battle Scout Cruiser [1906] (Seondok)

Heonson-Class, Seondok County Battle Scout Cruiser laid down 1906

Displacement:
	11,857 t light; 12,500 t standard; 13,417 t normal; 14,150 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(515.09 ft / 508.53 ft) x 68.90 ft x (26.25 / 27.34 ft)
	(157.00 m / 155.00 m) x 21.00 m  x (8.00 / 8.33 m)

Armament:
      4 - 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
	  2 x Twin mounts on centreline, evenly spread
      14 - 5.71" / 145 mm 45.0 cal guns - 93.81lbs / 42.55kg shells, 200 per gun
	  Quick firing guns in casemate mounts, 1898 Model
	  14 x Single mounts on sides, evenly spread
      8 - 3.44" / 87.5 mm 40.0 cal guns - 19.59lbs / 8.89kg shells, 200 per gun
	  Quick firing guns in deck mounts, 1894 Model
	  8 x Single mounts on sides, evenly spread
		8 raised mounts
      8 - 0.98" / 25.0 mm 55.0 cal guns - 0.51lbs / 0.23kg shells, 500 per gun
	  Quick firing guns in deck mounts, 1901 Model
	  8 x Single mounts on sides, evenly spread
		8 double raised mounts
      Weight of broadside 5,256 lbs / 2,384 kg
      Main Torpedoes
      4 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 2.048 t each, 8.191 t total
	submerged bow & stern tubes
      2nd Torpedoes
      4 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 2.048 t each, 8.191 t total
	In 1 sets of deck mounted carriage/fixed tubes

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	5.91" / 150 mm	406.82 ft / 124.00 m	9.97 ft / 3.04 m
	Ends:	2.95" / 75 mm	101.67 ft / 30.99 m	9.97 ft / 3.04 m
	Upper:	3.94" / 100 mm	406.82 ft / 124.00 m	8.01 ft / 2.44 m
	  Main Belt covers 123 % of normal length

   - Torpedo Bulkhead - Strengthened structural bulkheads:
		1.97" / 50 mm	406.82 ft / 124.00 m	23.33 ft / 7.11 m
	Beam between torpedo bulkheads 62.34 ft / 19.00 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	7.87" / 200 mm	3.94" / 100 mm		7.09" / 180 mm
	2nd:	3.94" / 100 mm	1.97" / 50 mm		3.94" / 100 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, 2 shafts, 45,116 shp / 33,657 Kw = 25.50 kts
	Range 5,000nm at 10.00 kts
	Bunker at max displacement = 1,650 tons (100% coal)

Complement:
	623 - 810

Cost:
	£1.304 million / $5.217 million

Distribution of weights at normal displacement:
	Armament: 977 tons, 7.3 %
	   - Guns: 950 tons, 7.1 %
	   - Weapons: 27 tons, 0.2 %
	Armour: 3,894 tons, 29.0 %
	   - Belts: 1,608 tons, 12.0 %
	   - Torpedo bulkhead: 691 tons, 5.2 %
	   - Armament: 633 tons, 4.7 %
	   - Armour Deck: 866 tons, 6.5 %
	   - Conning Tower: 96 tons, 0.7 %
	Machinery: 3,223 tons, 24.0 %
	Hull, fittings & equipment: 3,664 tons, 27.3 %
	Fuel, ammunition & stores: 1,560 tons, 11.6 %
	Miscellaneous weights: 100 tons, 0.7 %
	   - Above deck: 100 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  11,976 lbs / 5,432 Kg = 13.2 x 12.2 " / 310 mm shells or 1.2 torpedoes
	Stability (Unstable if below 1.00): 1.25
	Metacentric height 4.3 ft / 1.3 m
	Roll period: 13.9 seconds
	Steadiness	- As gun platform (Average = 50 %): 66 %
			- Recoil effect (Restricted arc if above 1.00): 0.62
	Seaboat quality  (Average = 1.00): 1.31

Hull form characteristics:
	Hull has a flush deck,
	  a ram bow and a cruiser stern
	Block coefficient (normal/deep): 0.511 / 0.517
	Length to Beam Ratio: 7.38 : 1
	'Natural speed' for length: 22.55 kts
	Power going to wave formation at top speed: 53 %
	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:	10.00 %,  22.97 ft / 7.00 m,  21.33 ft / 6.50 m
	   - Forward deck:	30.00 %,  21.33 ft / 6.50 m,  18.04 ft / 5.50 m
	   - Aft deck:	50.00 %,  18.04 ft / 5.50 m,  18.04 ft / 5.50 m
	   - Quarter deck:	10.00 %,  18.04 ft / 5.50 m,  18.04 ft / 5.50 m
	   - Average freeboard:		18.93 ft / 5.77 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 121.7 %
		- Above water (accommodation/working, high = better): 133.1 %
	Waterplane Area: 23,573 Square feet or 2,190 Square metres
	Displacement factor (Displacement / loading): 92 %
	Structure weight / hull surface area: 128 lbs/sq ft or 627 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.92
		- Longitudinal: 2.03
		- Overall: 1.00
	Cramped machinery, storage, compartmentation space
	Excellent accommodation and workspace room
	Good seaboat, rides out heavy weather easily