Hiria-class Protected Cruiser (1902)

Hiria-class, Syrellian Light Cruiser laid down 1902

Displacement:
 3,979 t light; 4,111 t standard; 4,464 t normal; 4,746 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (374.02 ft / 367.45 ft) x 43.64 ft x (18.04 / 18.94 ft)
 (114.00 m / 112.00 m) x 13.30 m x (5.50 / 5.77 m)

Armament:

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     2 - 5.91" / 150 mm 45.0 cal guns - 103.86lbs / 47.11kg shells, 200 per gun

```

 Breech loading guns in deck and hoist mounts, 1901 Model
 2 x Single mounts on centreline ends, evenly spread

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     8 - 2.95" / 75.0 mm 45.0 cal guns - 12.99lbs / 5.89kg shells, 350 per gun

```

 Quick firing guns in casemate mounts, 1902 Model
 8 x Single mounts on sides, evenly spread
 8 hull mounts in casemates- Limited use in all but light seas

```
     Weight of broadside 312 lbs / 141 kg
     Main Torpedoes
     2 - 17.7" / 450 mm, 13.12 ft / 4.00 m torpedoes - 0.508 t each, 1.017 t total

```

 In 2 sets of deck mounted carriage/fixed tubes

Armour:

```
  - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)

```

 Main: 1.57" / 40 mm 0.79" / 20 mm 1.57" / 40 mm
 2nd: 1.18" / 30 mm - -

```
  - Protected deck - single deck:

```

 For and Aft decks: 3.15" / 80 mm

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  - Conning towers: Forward 3.94" / 100 mm, Aft 0.00" / 0 mm

```

Machinery:
 Coal fired boilers, complex reciprocating steam engines,
 Direct drive, 2 shafts, 14,330 ihp / 10,690 Kw = 22.00 kts
 Range 4,200nm at 10.00 kts
 Bunker at max displacement = 635 tons (100% coal)

Complement:
 272 - 354

Cost:
 £0.463 million / $1.854 million

Distribution of weights at normal displacement:
 Armament: 76 tons, 1.7 %
 - Guns: 75 tons, 1.7 %
 - Weapons: 1 tons, 0.0 %
 Armour: 496 tons, 11.1 %
 - Armament: 28 tons, 0.6 %
 - Armour Deck: 446 tons, 10.0 %
 - Conning Tower: 23 tons, 0.5 %
 Machinery: 2,138 tons, 47.9 %
 Hull, fittings & equipment: 1,193 tons, 26.7 %
 Fuel, ammunition & stores: 485 tons, 10.9 %
 Miscellaneous weights: 75 tons, 1.7 %
 - Hull below water: 20 tons
 - Hull above water: 30 tons
 - On freeboard deck: 15 tons
 - Above deck: 10 tons

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
 2,123 lbs / 963 Kg = 20.6 x 5.9 " / 150 mm shells or 1.3 torpedoes
 Stability (Unstable if below 1.00): 1.50
 Metacentric height 2.9 ft / 0.9 m
 Roll period: 10.8 seconds
 Steadiness - As gun platform (Average = 50 %): 84 %
 - Recoil effect (Restricted arc if above 1.00): 0.14
 Seaboat quality (Average = 1.00): 1.69

Hull form characteristics:
 Hull has a flush deck,
 a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.540 / 0.547
 Length to Beam Ratio: 8.42 : 1
 'Natural speed' for length: 19.17 kts
 Power going to wave formation at top speed: 52 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -35.00 degrees
 Stern overhang: -6.56 ft / -2.00 m
 Freeboard (% = length of deck as a percentage of waterline length):
 Fore end, Aft end
 - Forecastle: 25.00 %, 21.33 ft / 6.50 m, 17.26 ft / 5.26 m
 - Forward deck: 30.00 %, 17.26 ft / 5.26 m, 13.42 ft / 4.09 m
 - Aft deck: 20.00 %, 13.42 ft / 4.09 m, 13.42 ft / 4.09 m
 - Quarter deck: 25.00 %, 13.42 ft / 4.09 m, 13.42 ft / 4.09 m
 - Average freeboard: 15.36 ft / 4.68 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 161.7 %
 - Above water (accommodation/working, high = better): 112.7 %
 Waterplane Area: 11,086 Square feet or 1,030 Square metres
 Displacement factor (Displacement / loading): 87 %
 Structure weight / hull surface area: 65 lbs/sq ft or 315 Kg/sq metre
 Hull strength (Relative):
 - Cross-sectional: 0.93
 - Longitudinal: 2.01
 - Overall: 1.00
 Cramped machinery, storage, compartmentation space
 Adequate 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