CRNS Summis Heavy Cruiser

CRNS Silvia, Calder Heavy Cruiser laid down 1934

Displacement:
	9,808 t light; 10,255 t standard; 11,502 t normal; 12,500 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(633.27 ft / 621.06 ft) x 61.02 ft x (18.70 / 19.95 ft)
	(193.02 m / 189.30 m) x 18.60 m  x (5.70 / 6.08 m)

Armament:
      6 - 8.07" / 205 mm 50.0 cal guns - 278.28lbs / 126.22kg shells, 100 per gun
	  Breech loading guns in turret on barbette mounts, 1934 Model
	  3 x 2 row twin mounts on centreline ends, majority forward
		2 raised mounts - superfiring
      10 - 5.12" / 130 mm 40.0 cal guns - 70.55lbs / 32.00kg shells, 300 per gun
	  Breech loading guns in deck and hoist mounts, 1934 Model
	  4 x 2-gun mounts on sides, evenly spread
	  1 x 2 row twin mount on centreline forward
		1 double raised mount
      12 - 1.46" / 37.0 mm 60.0 cal guns - 1.70lbs / 0.77kg shells, 600 per gun
	  Anti-air guns in deck mounts, 1934 Model
	  6 x Single mounts on sides, evenly spread
      Weight of broadside 2,396 lbs / 1,087 kg

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	3.35" / 85 mm	377.30 ft / 115.00 m	9.22 ft / 2.81 m
	Ends:	1.02" / 26 mm	240.32 ft / 73.25 m	9.22 ft / 2.81 m
	  3.44 ft / 1.05 m Unarmoured ends
	  Main Belt covers 93 % of normal length
	  Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead - Additional damage containing bulkheads:
		2.01" / 51 mm	409.25 ft / 124.74 m	19.23 ft / 5.86 m
	Beam between torpedo bulkheads 54.79 ft / 16.70 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	2.05" / 52 mm	2.05" / 52 mm		2.05" / 52 mm
	2nd:	0.98" / 25 mm	0.98" / 25 mm		      -

   - Armoured deck - multiple decks:
	For and Aft decks: 1.46" / 37 mm

   - Conning towers: Forward 4.53" / 115 mm, Aft 0.00" / 0 mm

Machinery:
	Oil fired boilers, steam turbines,
	Geared drive, 4 shafts, 92,180 shp / 68,766 Kw = 33.00 kts
	Range 10,000nm at 14.00 kts
	Bunker at max displacement = 2,245 tons

Complement:
	554 - 721

Cost:
	£4.637 million / $18.549 million

Distribution of weights at normal displacement:
	Armament: 681 tons, 5.9 %
	   - Guns: 681 tons, 5.9 %
	Armour: 2,031 tons, 17.7 %
	   - Belts: 569 tons, 4.9 %
	   - Torpedo bulkhead: 585 tons, 5.1 %
	   - Armament: 220 tons, 1.9 %
	   - Armour Deck: 608 tons, 5.3 %
	   - Conning Tower: 50 tons, 0.4 %
	Machinery: 2,652 tons, 23.1 %
	Hull, fittings & equipment: 4,443 tons, 38.6 %
	Fuel, ammunition & stores: 1,695 tons, 14.7 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  16,116 lbs / 7,310 Kg = 61.3 x 8.1 " / 205 mm shells or 2.3 torpedoes
	Stability (Unstable if below 1.00): 1.14
	Metacentric height 3.1 ft / 0.9 m
	Roll period: 14.6 seconds
	Steadiness	- As gun platform (Average = 50 %): 53 %
			- Recoil effect (Restricted arc if above 1.00): 0.67
	Seaboat quality  (Average = 1.00): 1.07

Hull form characteristics:
	Hull has a flush deck,
	  a straight bulbous bow and large transom stern
	Block coefficient (normal/deep): 0.568 / 0.579
	Length to Beam Ratio: 10.18 : 1
	'Natural speed' for length: 28.20 kts
	Power going to wave formation at top speed: 58 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 20.00 degrees
	Stern overhang: 2.30 ft / 0.70 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	21.00 %,  27.23 ft / 8.30 m,  21.00 ft / 6.40 m
	   - Forward deck:	19.00 %,  21.00 ft / 6.40 m,  21.00 ft / 6.40 m
	   - Aft deck:	44.00 %,  21.00 ft / 6.40 m,  21.00 ft / 6.40 m
	   - Quarter deck:	16.00 %,  21.00 ft / 6.40 m,  21.00 ft / 6.40 m
	   - Average freeboard:		21.52 ft / 6.56 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): 202.3 %
	Waterplane Area: 28,017 Square feet or 2,603 Square metres
	Displacement factor (Displacement / loading): 121 %
	Structure weight / hull surface area: 111 lbs/sq ft or 544 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.97
		- Longitudinal: 1.39
		- Overall: 1.00
	Adequate machinery, storage, compartmentation space
	Excellent accommodation and workspace room