CRNS Embra Prelim

CRNS Embra, Calder Republic Battleship laid down 1932 (Engine 1934)

Displacement:
	54,968 t light; 57,387 t standard; 60,821 t normal; 63,569 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(913.86 ft / 885.83 ft) x 111.55 ft x (35.43 / 36.75 ft)
	(278.54 m / 270.00 m) x 34.00 m  x (10.80 / 11.20 m)

Armament:
      6 - 18.11" / 460 mm 45.0 cal guns - 2,995.22lbs / 1,358.61kg shells, 100 per gun
	  Breech loading guns in turret on barbette mounts, 1926 Model
	  3 x 2-gun mounts on centreline ends, majority forward
		1 raised mount - superfiring
      10 - 5.12" / 130 mm 60.0 cal guns - 73.41lbs / 33.30kg shells, 500 per gun
	  Breech loading guns in deck and hoist mounts, 1919 Model
	  10 x Single mounts on sides, evenly spread
      Weight of broadside 18,705 lbs / 8,485 kg

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	14.2" / 360 mm	501.38 ft / 152.82 m	21.33 ft / 6.50 m
	Ends:	2.95" / 75 mm	384.42 ft / 117.17 m	21.33 ft / 6.50 m
	Upper:	2.95" / 75 mm	501.38 ft / 152.82 m	7.87 ft / 2.40 m
	  Main Belt covers 87 % of normal length
	  Main belt does not fully cover magazines and engineering spaces
	  Main Belt inclined -17.00 degrees (positive = in)

   - Torpedo Bulkhead - Additional damage containing bulkheads:
		2.95" / 75 mm	501.38 ft / 152.82 m	26.25 ft / 8.00 m
	Beam between torpedo bulkheads 82.02 ft / 25.00 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	19.9" / 506 mm	8.66" / 220 mm		14.2" / 361 mm
	2nd:	2.95" / 75 mm	1.97" / 50 mm		3.94" / 100 mm

   - Armoured deck - multiple decks:
	For and Aft decks: 9.06" / 230 mm
	Forecastle: 2.95" / 75 mm  Quarter deck: 2.95" / 75 mm

   - Conning towers: Forward 15.75" / 400 mm, Aft 0.00" / 0 mm

Machinery:
	Oil fired boilers, steam turbines,
	Geared drive, 4 shafts, 240,250 shp / 179,226 Kw = 32.10 kts
	Range 9,000nm at 15.00 kts
	Bunker at max displacement = 6,183 tons

Complement:
	1,936 - 2,517

Cost:
	£21.177 million / $84.709 million

Distribution of weights at normal displacement:
	Armament: 3,627 tons, 6.0 %
	   - Guns: 3,627 tons, 6.0 %
	Armour: 23,989 tons, 39.4 %
	   - Belts: 7,999 tons, 13.2 %
	   - Torpedo bulkhead: 1,438 tons, 2.4 %
	   - Armament: 3,862 tons, 6.4 %
	   - Armour Deck: 10,166 tons, 16.7 %
	   - Conning Tower: 525 tons, 0.9 %
	Machinery: 6,912 tons, 11.4 %
	Hull, fittings & equipment: 20,340 tons, 33.4 %
	Fuel, ammunition & stores: 5,854 tons, 9.6 %
	Miscellaneous weights: 100 tons, 0.2 %
	   - On freeboard deck: 100 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  96,687 lbs / 43,856 Kg = 32.6 x 18.1 " / 460 mm shells or 14.4 torpedoes
	Stability (Unstable if below 1.00): 1.13
	Metacentric height 7.4 ft / 2.3 m
	Roll period: 17.2 seconds
	Steadiness	- As gun platform (Average = 50 %): 58 %
			- Recoil effect (Restricted arc if above 1.00): 0.62
	Seaboat quality  (Average = 1.00): 1.17

Hull form characteristics:
	Hull has a flush deck,
	  a straight bulbous bow and a round stern
	Block coefficient (normal/deep): 0.608 / 0.613
	Length to Beam Ratio: 7.94 : 1
	'Natural speed' for length: 29.76 kts
	Power going to wave formation at top speed: 53 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 22.00 degrees
	Stern overhang: 13.45 ft / 4.10 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	21.70 %,  36.09 ft / 11.00 m,  26.90 ft / 8.20 m
	   - Forward deck:	30.00 %,  26.90 ft / 8.20 m,  26.90 ft / 8.20 m
	   - Aft deck:	26.60 %,  26.90 ft / 8.20 m,  27.23 ft / 8.30 m
	   - Quarter deck:	21.70 %,  27.23 ft / 8.30 m,  27.23 ft / 8.30 m
	   - Average freeboard:		27.82 ft / 8.48 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 87.1 %
		- Above water (accommodation/working, high = better): 193.3 %
	Waterplane Area: 72,812 Square feet or 6,764 Square metres
	Displacement factor (Displacement / loading): 111 %
	Structure weight / hull surface area: 208 lbs/sq ft or 1,015 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.97
		- Longitudinal: 1.24
		- Overall: 1.00
	Adequate machinery, storage, compartmentation space
	Excellent accommodation and workspace room