1903-Class Aviso [1903] (Calder)

1903 Class Aviso, Calder Republic Aviso laid down 1903

Displacement:
	5,934 t light; 6,150 t standard; 7,404 t normal; 8,407 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(529.86 ft / 524.93 ft) x 57.41 ft x (16.40 / 18.11 ft)
	(161.50 m / 160.00 m) x 17.50 m  x (5.00 / 5.52 m)

Armament:
      30 - 2.95" / 75.0 mm 50.0 cal guns - 13.63lbs / 6.18kg shells, 300 per gun
	  Quick firing guns in deck mounts, 1904 Model
	  30 x Single mounts on sides, evenly spread
      Weight of broadside 409 lbs / 185 kg

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Ends:	Unarmoured

   - Torpedo Bulkhead - Strengthened structural bulkheads:
		0.98" / 25 mm	524.93 ft / 160.00 m	14.99 ft / 4.57 m
	Beam between torpedo bulkheads 55.77 ft / 17.00 m

   - Conning towers: Forward 5.91" / 150 mm, Aft 0.00" / 0 mm

Machinery:
	Coal fired boilers, complex reciprocating steam engines,
	Direct drive, 2 shafts, 20,627 ihp / 15,388 Kw = 23.00 kts
	Range 11,000nm at 10.00 kts
	Bunker at max displacement = 2,257 tons (100% coal)

Complement:
	398 - 518

Cost:
	£0.662 million / $2.646 million

Distribution of weights at normal displacement:
	Armament: 86 tons, 1.2 %
	   - Guns: 86 tons, 1.2 %
	Armour: 335 tons, 4.5 %
	   - Torpedo bulkhead: 287 tons, 3.9 %
	   - Conning Tower: 48 tons, 0.7 %
	Machinery: 3,079 tons, 41.6 %
	Hull, fittings & equipment: 2,184 tons, 29.5 %
	Fuel, ammunition & stores: 1,470 tons, 19.9 %
	Miscellaneous weights: 250 tons, 3.4 %
	   - On freeboard deck: 250 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  6,170 lbs / 2,799 Kg = 479.3 x 3.0 " / 75 mm shells or 1.1 torpedoes
	Stability (Unstable if below 1.00): 1.55
	Metacentric height 4.6 ft / 1.4 m
	Roll period: 11.3 seconds
	Steadiness	- As gun platform (Average = 50 %): 100 %
			- Recoil effect (Restricted arc if above 1.00): 0.07
	Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
	Hull has raised forecastle,
	  a ram bow and a cruiser stern
	Block coefficient (normal/deep): 0.524 / 0.539
	Length to Beam Ratio: 9.14 : 1
	'Natural speed' for length: 22.91 kts
	Power going to wave formation at top speed: 43 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): -15.00 degrees
	Stern overhang: -3.28 ft / -1.00 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	20.00 %,  22.97 ft / 7.00 m,  22.97 ft / 7.00 m
	   - Forward deck:	30.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
	   - Aft deck:	35.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
	   - Quarter deck:	15.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
	   - Average freeboard:		20.34 ft / 6.20 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 142.4 %
		- Above water (accommodation/working, high = better): 193.5 %
	Waterplane Area: 20,535 Square feet or 1,908 Square metres
	Displacement factor (Displacement / loading): 106 %
	Structure weight / hull surface area: 77 lbs/sq ft or 376 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.96
		- Longitudinal: 1.52
		- Overall: 1.00
	Cramped machinery, storage, compartmentation space
	Excellent accommodation and workspace room
	Ship has slow, easy roll, a good, steady gun platform
	Excellent seaboat, comfortable, can fire her guns in the heaviest weather

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Additional Weights: 30 Wyverns