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| 1 | Tsurugi, Japanese Battleship laid down 1898 | |
| 2 | ||
| 3 | Displacement: | |
| 4 | 10,848 t light; 11,678 t standard; 12,500 t normal; 13,157 t full load | |
| 5 | ||
| 6 | Dimensions: Length (overall / waterline) x beam x draught (normal/deep) | |
| 7 | (419.95 ft / 410.11 ft) x 72.18 ft x (26.25 / 27.35 ft) | |
| 8 | (128.00 m / 125.00 m) x 22.00 m x (8.00 / 8.34 m) | |
| 9 | ||
| 10 | Armament: | |
| 11 | 4 - 12.01" / 305 mm 40.0 cal guns - 850.98lbs / 386.00kg shells, 100 per gun | |
| 12 | Breech loading guns in turret on barbette mounts, 1898 Model | |
| 13 | 2 x Twin mounts on centreline, evenly spread | |
| 14 | 8 - 9.25" / 235 mm 47.0 cal guns - 380.08lbs / 172.40kg shells, 125 per gun | |
| 15 | Breech loading guns in deck and hoist mounts, 1895 Model | |
| 16 | 4 x Twin mounts on sides, evenly spread | |
| 17 | 12 - 5.98" / 152 mm 40.0 cal guns - 99.87lbs / 45.30kg shells, 200 per gun | |
| 18 | Quick firing guns in casemate mounts, 1888 Model | |
| 19 | 12 x Single mounts on sides, evenly spread | |
| 20 | 10 hull mounts in casemates- Limited use in all but light seas | |
| 21 | 16 - 3.00" / 76.2 mm 40.0 cal guns - 12.94lbs / 5.87kg shells, 400 per gun | |
| 22 | Quick firing guns in casemate mounts, 1898 Model | |
| 23 | 12 x Single mounts on sides, evenly spread | |
| 24 | 4 x Single mounts on sides, aft deck aft | |
| 25 | Weight of broadside 7,850 lbs / 3,561 kg | |
| 26 | Main Torpedoes | |
| 27 | 4 - 17.7" / 450 mm, 11.67 ft / 3.56 m torpedoes - 0.393 t each, 1.572 t total | |
| 28 | submerged bow & stern tubes | |
| 29 | 2nd Torpedoes | |
| 30 | 4 - 17.7" / 450 mm, 11.67 ft / 3.56 m torpedoes - 0.393 t each, 1.572 t total | |
| 31 | below water reloads | |
| 32 | ||
| 33 | Armour: | |
| 34 | - Belts: Width (max) Length (avg) Height (avg) | |
| 35 | Main: 10.0" / 254 mm 298.56 ft / 91.00 m 9.84 ft / 3.00 m | |
| 36 | Ends: 5.00" / 127 mm 111.55 ft / 34.00 m 3.28 ft / 1.00 m | |
| 37 | Upper: 5.98" / 152 mm 298.56 ft / 91.00 m 7.55 ft / 2.30 m | |
| 38 | Main Belt covers 112 % of normal length | |
| 39 | ||
| 40 | - Torpedo Bulkhead - Strengthened structural bulkheads: | |
| 41 | 3.94" / 100 mm 298.56 ft / 91.00 m 24.15 ft / 7.36 m | |
| 42 | Beam between torpedo bulkheads 65.62 ft / 20.00 m | |
| 43 | ||
| 44 | - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) | |
| 45 | Main: 10.2" / 260 mm 5.00" / 127 mm 10.0" / 254 mm | |
| 46 | 2nd: 7.99" / 203 mm 3.15" / 80 mm 10.0" / 254 mm | |
| 47 | 3rd: 5.98" / 152 mm - 5.98" / 152 mm | |
| 48 | 4th: 3.94" / 100 mm - 5.00" / 127 mm | |
| 49 | ||
| 50 | - Protected deck - single deck: | |
| 51 | For and Aft decks: 1.97" / 50 mm | |
| 52 | Forecastle: 0.00" / 0 mm Quarter deck: 1.97" / 50 mm | |
| 53 | ||
| 54 | - Conning towers: Forward 9.06" / 230 mm, Aft 0.00" / 0 mm | |
| 55 | ||
| 56 | Machinery: | |
| 57 | Coal fired boilers, complex reciprocating steam engines, | |
| 58 | Direct drive, 2 shafts, 12,486 ihp / 9,315 Kw = 18.00 kts | |
| 59 | Range 5,000nm at 10.00 kts | |
| 60 | Bunker at max displacement = 1,480 tons (100% coal) | |
| 61 | ||
| 62 | Complement: | |
| 63 | 590 - 768 | |
| 64 | ||
| 65 | Cost: | |
| 66 | £1.319 million / $5.277 million | |
| 67 | ||
| 68 | Distribution of weights at normal displacement: | |
| 69 | Armament: 1,464 tons, 11.7 % | |
| 70 | - Guns: 1,459 tons, 11.7 % | |
| 71 | - Weapons: 5 tons, 0.0 % | |
| 72 | Armour: 4,737 tons, 37.9 % | |
| 73 | - Belts: 1,915 tons, 15.3 % | |
| 74 | - Torpedo bulkhead: 1,050 tons, 8.4 % | |
| 75 | - Armament: 943 tons, 7.5 % | |
| 76 | - Armour Deck: 724 tons, 5.8 % | |
| 77 | - Conning Tower: 105 tons, 0.8 % | |
| 78 | Machinery: 2,014 tons, 16.1 % | |
| 79 | Hull, fittings & equipment: 2,632 tons, 21.1 % | |
| 80 | Fuel, ammunition & stores: 1,651 tons, 13.2 % | |
| 81 | Miscellaneous weights: 1 tons, 0.0 % | |
| 82 | - Hull above water: 1 tons | |
| 83 | ||
| 84 | Overall survivability and seakeeping ability: | |
| 85 | Survivability (Non-critical penetrating hits needed to sink ship): | |
| 86 | 11,824 lbs / 5,363 Kg = 13.7 x 12.0 " / 305 mm shells or 7.2 torpedoes | |
| 87 | Stability (Unstable if below 1.00): 1.37 | |
| 88 | Metacentric height 5.3 ft / 1.6 m | |
| 89 | Roll period: 13.1 seconds | |
| 90 | Steadiness - As gun platform (Average = 50 %): 70 % | |
| 91 | - Recoil effect (Restricted arc if above 1.00): 0.59 | |
| 92 | Seaboat quality (Average = 1.00): 1.56 | |
| 93 | ||
| 94 | Hull form characteristics: | |
| 95 | Hull has a flush deck, | |
| 96 | a ram bow and a round stern | |
| 97 | Block coefficient (normal/deep): 0.563 / 0.569 | |
| 98 | Length to Beam Ratio: 5.68 : 1 | |
| 99 | 'Natural speed' for length: 20.25 kts | |
| 100 | Power going to wave formation at top speed: 46 % | |
| 101 | Trim (Max stability = 0, Max steadiness = 100): 45 | |
| 102 | Bow angle (Positive = bow angles forward): 0.00 degrees | |
| 103 | Stern overhang: 0.00 ft / 0.00 m | |
| 104 | Freeboard (% = length of deck as a percentage of waterline length): | |
| 105 | Fore end, Aft end | |
| 106 | - Forecastle: 15.00 %, 14.11 ft / 4.30 m, 14.11 ft / 4.30 m | |
| 107 | - Forward deck: 35.00 %, 14.11 ft / 4.30 m, 14.11 ft / 4.30 m | |
| 108 | - Aft deck: 35.00 %, 14.11 ft / 4.30 m, 14.11 ft / 4.30 m | |
| 109 | - Quarter deck: 15.00 %, 14.11 ft / 4.30 m, 14.11 ft / 4.30 m | |
| 110 | - Average freeboard: 14.11 ft / 4.30 m | |
| 111 | Ship tends to be wet forward | |
| 112 | ||
| 113 | Ship space, strength and comments: | |
| 114 | Space - Hull below water (magazines/engines, low = better): 111.8 % | |
| 115 | - Above water (accommodation/working, high = better): 95.3 % | |
| 116 | Waterplane Area: 20,914 Square feet or 1,943 Square metres | |
| 117 | Displacement factor (Displacement / loading): 83 % | |
| 118 | Structure weight / hull surface area: 145 lbs/sq ft or 707 Kg/sq metre | |
| 119 | Hull strength (Relative): | |
| 120 | - Cross-sectional: 0.91 | |
| 121 | - Longitudinal: 2.25 | |
| 122 | - Overall: 1.00 | |
| 123 | Cramped machinery, storage, compartmentation space | |
| 124 | Adequate accommodation and workspace room | |
| 125 | Ship has slow, easy roll, a good, steady gun platform | |
| 126 | Excellent seaboat, comfortable, can fire her guns in the heaviest weather | |
| 127 | ||
| 128 | 4 76mm guns are, in fact, directly stern mounted BUTT GUNS | |
| 129 | ||
| 130 | Designed to form the backbone of the IJN battleline along with the Suisho-class armored cruisers |
