MS-1 Class

[TacCovert4]

MS-1, Aztec Minesweeper laid down 1906

Displacement:
   561 t light; 580 t standard; 654 t normal; 713 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (153.52 ft / 147.64 ft) x 26.25 ft x (9.84 / 10.58 ft)
   (46.79 m / 45.00 m) x 8.00 m  x (3.00 / 3.22 m)

Armament:
      2 - 3.94" / 100 mm 45.0 cal guns - 30.78lbs / 13.96kg shells, 160 per gun
     Quick firing guns in deck mounts, 1906 Model
     2 x Single mounts on centreline ends, evenly spread
      1 raised mount - superfiring
      2 - 1.57" / 40.0 mm 45.0 cal guns - 1.97lbs / 0.89kg shells, 200 per gun
     Quick firing guns in deck mounts, 1906 Model
     2 x Single mounts on sides amidships
      Weight of broadside 65 lbs / 30 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.26" / 32 mm         -               -

   - Protected deck - single deck:
   For and Aft decks: 1.26" / 32 mm

   - Conning towers: Forward 1.26" / 32 mm, Aft 0.00" / 0 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 1,941 shp / 1,448 Kw = 16.00 kts
   Range 2,500nm at 10.00 kts
   Bunker at max displacement = 134 tons (90% coal)

Complement:
   64 - 84

Cost:
   £0.042 million / $0.168 million

Distribution of weights at normal displacement:
   Armament: 12 tons, 1.8 %
      - Guns: 12 tons, 1.8 %
   Armour: 62 tons, 9.5 %
      - Armament: 6 tons, 0.9 %
      - Armour Deck: 54 tons, 8.3 %
      - Conning Tower: 2 tons, 0.3 %
   Machinery: 137 tons, 21.0 %
   Hull, fittings & equipment: 168 tons, 25.7 %
   Fuel, ammunition & stores: 93 tons, 14.3 %
   Miscellaneous weights: 181 tons, 27.7 %
      - On freeboard deck: 181 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,029 lbs / 467 Kg = 33.7 x 3.9 " / 100 mm shells or 0.7 torpedoes
   Stability (Unstable if below 1.00): 1.09
   Metacentric height 0.8 ft / 0.2 m
   Roll period: 12.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 66 %
         - Recoil effect (Restricted arc if above 1.00): 0.18
   Seaboat quality  (Average = 1.00): 1.32

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.600 / 0.609
   Length to Beam Ratio: 5.63 : 1
   'Natural speed' for length: 12.15 kts
   Power going to wave formation at top speed: 66 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 10.00 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 %,  14.76 ft / 4.50 m,  14.76 ft / 4.50 m
      - Forward deck:   30.00 %,  14.76 ft / 4.50 m,  13.12 ft / 4.00 m
      - Aft deck:   35.00 %,  6.56 ft / 2.00 m,  6.56 ft / 2.00 m
      - Quarter deck:   15.00 %,  6.56 ft / 2.00 m,  6.56 ft / 2.00 m
      - Average freeboard:      10.42 ft / 3.18 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 74.1 %
      - Above water (accommodation/working, high = better): 84.1 %
   Waterplane Area: 2,834 Square feet or 263 Square metres
   Displacement factor (Displacement / loading): 119 %
   Structure weight / hull surface area: 35 lbs/sq ft or 171 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.84
      - Longitudinal: 5.17
      - Overall: 1.00
   Excellent machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Good seaboat, rides out heavy weather easily

25t Minesweeping Equpment

156t Mines/Rails