Custodi I Class Sloops

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All Ten Custodi I Sloops, depicted below in their final configuration, were scapped in 1926H1

Custodi I, Imperial Roman Navy Sloop laid down 1890

Displacement:
   500 t light; 520 t standard; 596 t normal; 657 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (187.00 ft / 183.73 ft) x 26.25 ft x (9.84 / 10.58 ft)
   (57.00 m / 56.00 m) x 8.00 m  x (3.00 / 3.22 m)

Armament:
      1 - 5.51" / 140 mm 45.0 cal gun - 79.37lbs / 36.00kg shells, 50 per gun
     Breech loading gun in deck mount, 1890 Model
     1 x Single mount on centreline, forward deck centre
      2 - 2.95" / 75.0 mm 45.0 cal guns - 13.23lbs / 6.00kg shells, 150 per gun
     Breech loading guns in deck mounts, 1890 Model
     2 x Single mounts on sides, aft deck centre
      4 - 1.77" / 45.0 mm 45.0 cal guns - 2.76lbs / 1.25kg shells, 500 per gun
     Breech loading guns in deck mounts, 1885 Model
     4 x Single mounts on sides, evenly spread
      Weight of broadside 117 lbs / 53 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.59" / 15 mm         -               -
   2nd:   0.59" / 15 mm         -               -

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 1 shaft, 675 ihp / 504 Kw = 13.02 kts
   Range 2,500nm at 10.00 kts
   Bunker at max displacement = 137 tons (100% coal)

Complement:
   59 - 78

Cost:
   £0.042 million / $0.167 million

Distribution of weights at normal displacement:
   Armament: 19 tons, 3.2 %
      - Guns: 19 tons, 3.2 %
   Armour: 4 tons, 0.7 %
      - Armament: 4 tons, 0.7 %
   Machinery: 131 tons, 22.0 %
   Hull, fittings & equipment: 188 tons, 31.5 %
   Fuel, ammunition & stores: 96 tons, 16.0 %
   Miscellaneous weights: 158 tons, 26.5 %
      - Hull below water: 3 tons
      - Hull above water: 95 tons
      - On freeboard deck: 50 tons
      - Above deck: 10 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     722 lbs / 328 Kg = 8.6 x 5.5 " / 140 mm shells or 0.5 torpedoes
   Stability (Unstable if below 1.00): 1.27
   Metacentric height 1.0 ft / 0.3 m
   Roll period: 10.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.18
   Seaboat quality  (Average = 1.00): 1.92

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.440 / 0.451
   Length to Beam Ratio: 7.00 : 1
   'Natural speed' for length: 13.55 kts
   Power going to wave formation at top speed: 40 %
   Trim (Max stability = 0, Max steadiness = 100): 37
   Bow angle (Positive = bow angles forward): 5.00 degrees
   Stern overhang: 2.56 ft / 0.78 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Forward deck:   30.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Aft deck:   35.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Quarter deck:   15.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Average freeboard:      8.20 ft / 2.50 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 99.2 %
      - Above water (accommodation/working, high = better): 76.8 %
   Waterplane Area: 2,901 Square feet or 270 Square metres
   Displacement factor (Displacement / loading): 124 %
   Structure weight / hull surface area: 40 lbs/sq ft or 197 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.90
      - Longitudinal: 2.44
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather