Dannebrog, Denmark Royal Yacht laid down 1939
Displacement:
1,197 t light; 1,224 t standard; 1,356 t normal; 1,461 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(247.97 ft / 218.06 ft) x 34.12 ft x (11.98 / 12.70 ft)
(75.58 m / 66.46 m) x 10.40 m x (3.65 / 3.87 m)
Armament:
2 - 1.46" / 37.0 mm 45.0 cal guns - 1.56lbs / 0.71kg shells, 50 per gun
Breech loading guns in deck mounts, 1910 Model Saluting Guns
2 x Single mounts on sides, forward deck centre
4 - 0.51" / 13.0 mm 45.0 cal guns - 0.07lbs / 0.03kg shells, 5,000 per gun
Machine guns in deck mounts, 1939 Model
4 x Single mounts on sides, evenly spread
Weight of broadside 3 lbs / 2 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 0.59" / 15 mm 91.86 ft / 28.00 m 16.40 ft / 5.00 m
Ends: 0.59" / 15 mm 125.98 ft / 38.40 m 16.40 ft / 5.00 m
Upper: 0.59" / 15 mm 91.86 ft / 28.00 m 9.84 ft / 3.00 m
Main Belt covers 65 % of normal length
- Conning towers: Forward 0.98" / 25 mm, Aft 0.00" / 0 mm
Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 3,913 shp / 2,919 Kw = 18.00 kts
Range 3,860nm at 14.00 kts
Bunker at max displacement = 237 tons
Complement:
111 - 145
Cost:
£0.332 million / $1.326 million
Distribution of weights at normal displacement:
Armament: 1 tons, 0.1 %
Armour: 117 tons, 8.6 %
- Belts: 114 tons, 8.4 %
- Conning Tower: 3 tons, 0.2 %
Machinery: 106 tons, 7.8 %
Hull, fittings & equipment: 423 tons, 31.2 %
Fuel, ammunition & stores: 159 tons, 11.8 %
Miscellaneous weights: 550 tons, 40.6 %
- Hull below water: 50 tons
- Hull above water: 225 tons
- On freeboard deck: 225 tons
- Above deck: 50 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
3,699 lbs / 1,678 Kg = 2,393.4 x 1.5 " / 37 mm shells or 1.6 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 1.2 ft / 0.4 m
Roll period: 13.1 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 2.00
Hull form characteristics:
Hull has a flush deck,
a normal bow and a round stern
Block coefficient (normal/deep): 0.533 / 0.541
Length to Beam Ratio: 6.39 : 1
'Natural speed' for length: 14.77 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 40.00 degrees
Stern overhang: 13.12 ft / 4.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 20.00 ft / 6.10 m, 16.00 ft / 4.88 m
- Forward deck: 30.00 %, 16.00 ft / 4.88 m, 14.00 ft / 4.27 m
- Aft deck: 35.00 %, 14.00 ft / 4.27 m, 14.00 ft / 4.27 m
- Quarter deck: 15.00 %, 14.00 ft / 4.27 m, 14.00 ft / 4.27 m
- Average freeboard: 15.02 ft / 4.58 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 48.9 %
- Above water (accommodation/working, high = better): 126.8 %
Waterplane Area: 5,109 Square feet or 475 Square metres
Displacement factor (Displacement / loading): 154 %
Structure weight / hull surface area: 43 lbs/sq ft or 209 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.83
- Longitudinal: 5.14
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather