Björnen, Sweden Destroyer laid down 1924 Displacement: 1 591 t light; 1 647 t standard; 1 700 t normal; 1 742 t full load Dimensions: Length overall / water x beam x draught 377,43 ft / 360,89 ft x 32,81 ft (Bulges 39,37 ft) x 13,12 ft (normal load) 115,04 m / 110,00 m x 10,00 m (Bulges 12,00 m) x 4,00 m Armament: 6 - 4,13" / 105 mm guns (3x2 guns), 35,32lbs / 16,02kg shells, 1924 Model Dual purpose guns in deck mounts with hoists on centreline ends, majority forward, 1 raised mount - superfiring 6 - 2,24" / 57,0 mm guns (3x2 guns), 5,65lbs / 2,56kg shells, 1924 Model Anti-aircraft guns in deck mounts on side, all amidships, all raised mounts - superfiring 8 - 0,98" / 25,0 mm guns (4x2 guns), 0,48lbs / 0,22kg shells, 1924 Model Machine guns in deck mounts on side, evenly spread, all raised mounts Weight of broadside 250 lbs / 113 kg Shells per gun, main battery: 150 8 - 21,0" / 533,4 mm above water torpedoes Armour: - Belts: Width (max) Length (avg) Height (avg) Main: 0,39" / 10 mm 198,49 ft / 60,50 m 6,89 ft / 2,10 m Ends: Unarmoured Main Belt covers 85 % of normal length Main belt does not fully cover magazines and engineering spaces - Torpedo Bulkhead and Bulges: 0,10" / 2 mm 198,49 ft / 60,50 m 9,25 ft / 2,82 m - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max) Main: 0,98" / 25 mm 0,20" / 5 mm 0,98" / 25 mm - Armour deck: 0,39" / 10 mm, Conning tower: 0,98" / 25 mm Machinery: Oil fired boilers, steam turbines, Geared drive, 2 shafts, 37 868 shp / 28 249 Kw = 35,00 kts Range 1 200nm at 14,00 kts (Bunkerage = 95 tons) Complement: 132 - 172 Cost: £0,637 million / $2,548 million Distribution of weights at normal displacement: Armament: 31 tons, 1,8 % Armour: 95 tons, 5,6 % - Belts: 23 tons, 1,3 % - Torpedo bulkhead: 7 tons, 0,4 % - Armament: 8 tons, 0,5 % - Armour Deck: 55 tons, 3,3 % - Conning Tower: 3 tons, 0,2 % Machinery: 887 tons, 52,2 % Hull, fittings & equipment: 568 tons, 33,4 % Fuel, ammunition & stores: 109 tons, 6,4 % Miscellaneous weights: 10 tons, 0,6 % Overall survivability and seakeeping ability: Survivability (Non-critical penetrating hits needed to sink ship): 66 lbs / 30 Kg = 1,9 x 4,1 " / 105 mm shells or 0,1 torpedoes Stability (Unstable if below 1.00): 1,38 Metacentric height 1,6 ft / 0,5 m Roll period: 12,9 seconds Steadiness - As gun platform (Average = 50 %): 57 % - Recoil effect (Restricted arc if above 1.00): 0,23 Seaboat quality (Average = 1.00): 1,15 Hull form characteristics: Hull has raised forecastle and transom stern Block coefficient: 0,319 Length to Beam Ratio: 9,17 : 1 'Natural speed' for length: 22,49 kts Power going to wave formation at top speed: 66 % Trim (Max stability = 0, Max steadiness = 100): 50 Bow angle (Positive = bow angles forward): 30,00 degrees Stern overhang: 3,28 ft / 1,00 m Freeboard (% = measuring location as a percentage of overall length): - Stem: 22,97 ft / 7,00 m - Forecastle (30 %): 19,69 ft / 6,00 m (13,12 ft / 4,00 m aft of break) - Mid (50 %): 13,12 ft / 4,00 m - Quarterdeck (15 %): 13,12 ft / 4,00 m - Stern: 13,12 ft / 4,00 m - Average freeboard: 15,49 ft / 4,72 m Ship space, strength and comments: Space - Hull below water (magazines/engines, low = better): 469,2 % - Above water (accommodation/working, high = better): 77,0 % Waterplane Area: 7 608 Square feet or 707 Square metres Displacement factor (Displacement / loading): 60 % Structure weight / hull surface area: 35 lbs/sq ft or 172 Kg/sq metre Hull strength (Relative): - Cross-sectional: 0,47 - Longitudinal: 2,17 - Overall: 0,54 Hull space for machinery, storage, compartmentation is extremely poor Room for accommodation and workspaces is cramped