USS Thirteen Colonies

Thirteen Colonies, USA Battleship laid down 1921

Displacement:
	42,301 t light; 45,877 t standard; 49,979 t normal; 53,261 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(785.40 ft / 754.59 ft) x 101.71 ft x (34.12 / 36.04 ft)
	(239.39 m / 230.00 m) x 31.00 m  x (10.40 / 10.99 m)

Armament:
      12 - 15.98" / 406 mm 50.0 cal guns - 2,161.70lbs / 980.53kg shells, 150 per gun
	  Breech loading guns in turret on barbette mounts, 1916 Model
	  4 x 3-gun mounts on centreline, evenly spread
		2 raised mounts
      16 - 5.98" / 152 mm 53.0 cal guns - 114.86lbs / 52.10kg shells, 300 per gun
	  Breech loading guns in deck and hoist mounts, 1920 Model
	  6 x Twin mounts on sides, forward deck aft
		2 raised mounts - superfiring
	  2 x Twin mounts on sides, aft deck forward
      8 - 5.00" / 127 mm 25.0 cal guns - 53.99lbs / 24.49kg shells, 450 per gun
	  Dual purpose guns in deck mounts, 1921 Model
	  8 x Single mounts on centreline, evenly spread
		8 double raised mounts
      Weight of broadside 28,210 lbs / 12,796 kg

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	16.0" / 406 mm	429.79 ft / 131.00 m	13.12 ft / 4.00 m
	Ends:	4.02" / 102 mm	324.80 ft / 99.00 m	13.12 ft / 4.00 m
	  Main Belt covers 88 % of normal length
	  Main Belt inclined -5.00 degrees (positive = in)

   - Torpedo Bulkhead - Additional damage containing bulkheads:
		3.94" / 100 mm	429.79 ft / 131.00 m	32.81 ft / 10.00 m
	Beam between torpedo bulkheads 82.02 ft / 25.00 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	18.0" / 457 mm	7.72" / 196 mm		16.0" / 406 mm
	2nd:	2.99" / 76 mm	2.01" / 51 mm		2.99" / 76 mm

   - Armoured deck - multiple decks:
	For and Aft decks: 5.98" / 152 mm
	Forecastle: 1.50" / 38 mm  Quarter deck: 2.99" / 76 mm

   - Conning towers: Forward 15.98" / 406 mm, Aft 5.00" / 127 mm

Machinery:
	Oil fired boilers, steam turbines,
	Electric motors, 4 shafts, 63,387 shp / 47,287 Kw = 23.00 kts
	Range 18,000nm at 12.00 kts
	Bunker at max displacement = 7,384 tons

Complement:
	1,670 - 2,172

Cost:
	£11.936 million / $47.743 million

Distribution of weights at normal displacement:
	Armament: 6,209 tons, 12.4 %
	   - Guns: 6,209 tons, 12.4 %
	Armour: 17,565 tons, 35.1 %
	   - Belts: 4,619 tons, 9.2 %
	   - Torpedo bulkhead: 2,054 tons, 4.1 %
	   - Armament: 4,632 tons, 9.3 %
	   - Armour Deck: 5,646 tons, 11.3 %
	   - Conning Towers: 613 tons, 1.2 %
	Machinery: 2,183 tons, 4.4 %
	Hull, fittings & equipment: 16,344 tons, 32.7 %
	Fuel, ammunition & stores: 7,678 tons, 15.4 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  61,881 lbs / 28,069 Kg = 30.3 x 16.0 " / 406 mm shells or 10.2 torpedoes
	Stability (Unstable if below 1.00): 1.05
	Metacentric height 5.6 ft / 1.7 m
	Roll period: 18.0 seconds
	Steadiness	- As gun platform (Average = 50 %): 51 %
			- Recoil effect (Restricted arc if above 1.00): 1.07
	Seaboat quality  (Average = 1.00): 1.21

Hull form characteristics:
	Hull has rise forward of midbreak,
	  a straight bulbous bow and a cruiser stern
	Block coefficient (normal/deep): 0.668 / 0.674
	Length to Beam Ratio: 7.42 : 1
	'Natural speed' for length: 27.47 kts
	Power going to wave formation at top speed: 42 %
	Trim (Max stability = 0, Max steadiness = 100): 42
	Bow angle (Positive = bow angles forward): 40.00 degrees
	Stern overhang: 3.28 ft / 1.00 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	25.00 %,  32.81 ft / 10.00 m,  23.95 ft / 7.30 m
	   - Forward deck:	35.00 %,  23.95 ft / 7.30 m,  22.97 ft / 7.00 m
	   - Aft deck:	22.00 %,  13.12 ft / 4.00 m,  13.12 ft / 4.00 m
	   - Quarter deck:	18.00 %,  13.12 ft / 4.00 m,  13.12 ft / 4.00 m
	   - Average freeboard:		20.33 ft / 6.20 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 85.1 %
		- Above water (accommodation/working, high = better): 132.7 %
	Waterplane Area: 59,766 Square feet or 5,552 Square metres
	Displacement factor (Displacement / loading): 101 %
	Structure weight / hull surface area: 231 lbs/sq ft or 1,126 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.97
		- Longitudinal: 1.22
		- Overall: 1.00
	Adequate machinery, storage, compartmentation space
	Excellent accommodation and workspace room
	Good seaboat, rides out heavy weather easily

TDS is 3 bulkheads of 15mm and an inner bulkhead of 55mm of void-oil-void all 1 meter thick