Malleus Vulcani Class Supply Ship

[snip]

One Ship
--IRS Malleus Vulcani

FSS-14, Imperial Roman Fleet Support Ship laid down 1914

Displacement:
   9,140 t light; 9,361 t standard; 10,628 t normal; 11,643 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (426.51 ft / 426.51 ft) x 49.21 ft x (23.79 / 25.81 ft)
   (130.00 m / 130.00 m) x 15.00 m  x (7.25 / 7.87 m)

Armament:
      2 - 5.51" / 140 mm 55.0 cal guns - 85.98lbs / 39.00kg shells, 75 per gun
     Breech loading guns in deck mounts, 1909 Model
     2 x Single mounts on centreline ends, evenly spread
      2 raised mounts
      2 - 1.77" / 45.0 mm 50.0 cal guns - 3.31lbs / 1.50kg shells, 50 per gun
     Anti-air guns in deck mounts, 1910 Model
     2 x Single mounts on sides, aft deck centre
      2 double raised mounts
      4 - 0.26" / 6.5 mm 110.0 cal guns - 0.01lbs / 0.00kg shells, 10,000 per gun
     Machine guns in deck mounts, 1911 Model
     4 x Single mounts on sides, evenly spread
      4 double raised mounts
      Weight of broadside 179 lbs / 81 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.39" / 10 mm         -               -
   2nd:   0.20" / 5 mm         -               -
   3rd:   0.20" / 5 mm         -               -

   - Box over machinery & magazines:
   1.18" / 30 mm

Machinery:
   Oil fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 8,000 ihp / 5,968 Kw = 16.41 kts
   Range 7,000nm at 14.00 kts
   Bunker at max displacement = 2,282 tons

Complement:
   523 - 680

Cost:
   £0.506 million / $2.026 million

Distribution of weights at normal displacement:
   Armament: 35 tons, 0.3 %
      - Guns: 35 tons, 0.3 %
   Armour: 79 tons, 0.7 %
      - Armament: 5 tons, 0.0 %
      - Armour Deck: 74 tons, 0.7 %
   Machinery: 478 tons, 4.5 %
   Hull, fittings & equipment: 1,948 tons, 18.3 %
   Fuel, ammunition & stores: 1,488 tons, 14.0 %
   Miscellaneous weights: 6,600 tons, 62.1 %
      - Hull below water: 3,000 tons
      - Hull above water: 2,000 tons
      - On freeboard deck: 1,200 tons
      - Above deck: 400 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     13,155 lbs / 5,967 Kg = 157.1 x 5.5 " / 140 mm shells or 2.0 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 2.1 ft / 0.7 m
   Roll period: 14.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.04
   Seaboat quality  (Average = 1.00): 1.74

Hull form characteristics:
   Hull has raised forecastle, raised quarterdeck ,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.745 / 0.752
   Length to Beam Ratio: 8.67 : 1
   'Natural speed' for length: 20.65 kts
   Power going to wave formation at top speed: 39 %
   Trim (Max stability = 0, Max steadiness = 100): 29
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  21.33 ft / 6.50 m,  21.33 ft / 6.50 m
      - Forward deck:   30.00 %,  12.30 ft / 3.75 m,  12.30 ft / 3.75 m
      - Aft deck:   35.00 %,  12.30 ft / 3.75 m,  12.30 ft / 3.75 m
      - Quarter deck:   15.00 %,  21.33 ft / 6.50 m,  21.33 ft / 6.50 m
      - Average freeboard:      15.46 ft / 4.71 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 67.5 %
      - Above water (accommodation/working, high = better): 78.4 %
   Waterplane Area: 17,505 Square feet or 1,626 Square metres
   Displacement factor (Displacement / loading): 137 %
   Structure weight / hull surface area: 69 lbs/sq ft or 339 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.33
      - Overall: 1.00
   Excellent machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Misc Distribution
--Below Water (3000t)
----3000t Resupply
--Above Water (2000t)
----2000t Resupply
--On Deck (1200t)
----700t Resupply
----500t Cranes and other logistical equipment
--Above Deck (400t)
----200t Resupply
----200t Cranes and other logistical equipment