Basireus-Class Battleship [1909] (Serpentia)

Basireus-Class, Serpentian Monarchy Battleship laid down 1909

Displacement:
	17,825 t light; 18,977 t standard; 19,956 t normal; 20,738 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(583.99 ft / 574.15 ft) x 78.74 ft x (27.89 / 28.75 ft)
	(178.00 m / 175.00 m) x 24.00 m  x (8.50 / 8.76 m)

Armament:
      8 - 12.01" / 305 mm 50.0 cal guns - 916.46lbs / 415.70kg shells, 125 per gun
	  Breech loading guns in turret on barbette mounts, 1907 Model
	  2 x 2 row quad mounts on centreline, evenly spread
      12 - 6.10" / 155 mm 47.0 cal guns - 121.25lbs / 55.00kg shells, 250 per gun
	  Quick firing guns in turret on barbette mounts, 1905 Model
	  6 x Twin mounts on sides, evenly spread
		2 raised mounts
      14 - 2.99" / 76.0 mm 45.0 cal guns - 17.64lbs / 8.00kg shells, 300 per gun
	  Quick firing guns in casemate mounts, 1895 Model
	  14 x Single mounts on sides, evenly spread
		14 hull mounts in casemates- Limited use in heavy seas
      4 - 1.50" / 38.0 mm 42.0 cal guns - 1.61lbs / 0.73kg shells, 300 per gun
	  Quick firing guns in deck mounts, 1899 Model
	  4 x Single mounts on centreline, evenly spread
		4 double raised mounts
      Weight of broadside 9,040 lbs / 4,101 kg
      Main Torpedoes
      4 - 15.0" / 380 mm, 18.04 ft / 5.50 m torpedoes - 0.618 t each, 2.471 t total
	submerged bow & stern tubes
      2nd Torpedoes
      4 - 15.0" / 380 mm, 18.04 ft / 5.50 m torpedoes - 0.618 t each, 2.471 t total
	below water reloads

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	12.0" / 305 mm	393.70 ft / 120.00 m	10.66 ft / 3.25 m
	Ends:	6.10" / 155 mm	180.45 ft / 55.00 m	10.66 ft / 3.25 m
	Upper:	7.87" / 200 mm	393.70 ft / 120.00 m	8.01 ft / 2.44 m
	  Main Belt covers 105 % of normal length

   - Torpedo Bulkhead - Strengthened structural bulkheads:
		0.12" / 3 mm	393.70 ft / 120.00 m	24.61 ft / 7.50 m
	Beam between torpedo bulkheads 59.06 ft / 18.00 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	13.8" / 350 mm	13.8" / 350 mm		9.84" / 250 mm
	2nd:	6.10" / 155 mm	3.94" / 100 mm		3.94" / 100 mm
	3rd:	2.99" / 76 mm	0.98" / 25 mm		      -
	4th:	1.97" / 50 mm	      -			      -

   - Armoured deck - multiple decks:
	For and Aft decks: 2.99" / 76 mm
	Forecastle: 1.97" / 50 mm  Quarter deck: 1.97" / 50 mm

   - Conning towers: Forward 14.17" / 360 mm, Aft 0.00" / 0 mm

Machinery:
	Coal and oil fired boilers, steam turbines,
	Direct drive, 4 shafts, 44,291 shp / 33,041 Kw = 24.00 kts
	Range 5,000nm at 10.00 kts
	Bunker at max displacement = 1,761 tons (90% coal)

Complement:
	839 - 1,091

Cost:
	£1.841 million / $7.364 million

Distribution of weights at normal displacement:
	Armament: 2,162 tons, 10.8 %
	   - Guns: 2,154 tons, 10.8 %
	   - Weapons: 8 tons, 0.0 %
	Armour: 7,064 tons, 35.4 %
	   - Belts: 3,602 tons, 18.1 %
	   - Torpedo bulkhead: 42 tons, 0.2 %
	   - Armament: 1,540 tons, 7.7 %
	   - Armour Deck: 1,655 tons, 8.3 %
	   - Conning Tower: 225 tons, 1.1 %
	Machinery: 2,193 tons, 11.0 %
	Hull, fittings & equipment: 6,306 tons, 31.6 %
	Fuel, ammunition & stores: 2,131 tons, 10.7 %
	Miscellaneous weights: 100 tons, 0.5 %
	   - Above deck: 100 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  23,130 lbs / 10,492 Kg = 26.7 x 12.0 " / 305 mm shells or 6.7 torpedoes
	Stability (Unstable if below 1.00): 1.09
	Metacentric height 4.1 ft / 1.3 m
	Roll period: 16.3 seconds
	Steadiness	- As gun platform (Average = 50 %): 56 %
			- Recoil effect (Restricted arc if above 1.00): 0.68
	Seaboat quality  (Average = 1.00): 1.12

Hull form characteristics:
	Hull has a flush deck,
	  a ram bow and a cruiser stern
	Block coefficient (normal/deep): 0.554 / 0.558
	Length to Beam Ratio: 7.29 : 1
	'Natural speed' for length: 23.96 kts
	Power going to wave formation at top speed: 48 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): -4.00 degrees
	Stern overhang: 0.00 ft / 0.00 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	20.00 %,  18.04 ft / 5.50 m,  16.40 ft / 5.00 m
	   - Forward deck:	30.00 %,  16.40 ft / 5.00 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:		16.54 ft / 5.04 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 104.6 %
		- Above water (accommodation/working, high = better): 117.9 %
	Waterplane Area: 31,669 Square feet or 2,942 Square metres
	Displacement factor (Displacement / loading): 99 %
	Structure weight / hull surface area: 161 lbs/sq ft or 788 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.96
		- Longitudinal: 1.41
		- Overall: 1.00
	Adequate machinery, storage, compartmentation space
	Adequate accommodation and workspace room