Custodi IV class Sloop

[snip]

Twenty four ships (as of 1923H1)

Custodi IV, Imperial Roman Navy Sloop laid down 1915

Displacement:
   500 t light; 515 t standard; 629 t normal; 720 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 / 10.87 ft)
   (57.00 m / 56.00 m) x 8.00 m  x (3.00 / 3.31 m)

Armament:
      1 - 3.94" / 100 mm 45.0 cal gun - 30.86lbs / 14.00kg shells, 75 per gun
     Quick firing gun in deck mount, 1906 Model
     1 x Single mount on centreline, forward deck centre
      2 - 1.77" / 45.0 mm 45.0 cal guns - 3.31lbs / 1.50kg shells, 250 per gun
     Quick firing guns in deck mounts, 1905 Model
     2 x Single mounts on sides, aft deck aft
      4 - 0.26" / 6.5 mm 110.0 cal guns - 0.01lbs / 0.00kg shells, 1,000 per gun
     Machine guns in deck mounts, 1911 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 38 lbs / 17 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.59" / 15 mm   0.20" / 5 mm            -
   2nd:   0.20" / 5 mm         -               -
   3rd:   0.20" / 5 mm         -               -

   - Box over machinery & magazines:
   0.39" / 10 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Electric motors, 2 shafts, 800 ihp / 597 Kw = 13.48 kts
   Range 5,500nm at 10.00 kts
   Bunker at max displacement = 206 tons (100% coal)

Complement:
   62 - 81

Cost:
   £0.039 million / $0.156 million

Distribution of weights at normal displacement:
   Armament: 7 tons, 1.1 %
      - Guns: 7 tons, 1.1 %
   Armour: 18 tons, 2.9 %
      - Armament: 5 tons, 0.8 %
      - Armour Deck: 13 tons, 2.1 %
   Machinery: 52 tons, 8.3 %
   Hull, fittings & equipment: 172 tons, 27.4 %
   Fuel, ammunition & stores: 129 tons, 20.5 %
   Miscellaneous weights: 250 tons, 39.7 %
      - Hull below water: 75 tons
      - Hull above water: 50 tons
      - On freeboard deck: 110 tons
      - Above deck: 15 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,424 lbs / 646 Kg = 46.7 x 3.9 " / 100 mm shells or 1.1 torpedoes
   Stability (Unstable if below 1.00): 1.23
   Metacentric height 1.0 ft / 0.3 m
   Roll period: 11.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.07
   Seaboat quality  (Average = 1.00): 1.94

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.464 / 0.481
   Length to Beam Ratio: 7.00 : 1
   'Natural speed' for length: 13.55 kts
   Power going to wave formation at top speed: 43 %
   Trim (Max stability = 0, Max steadiness = 100): 36
   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): 52.8 %
      - Above water (accommodation/working, high = better): 78.4 %
   Waterplane Area: 3,112 Square feet or 289 Square metres
   Displacement factor (Displacement / loading): 161 %
   Structure weight / hull surface area: 35 lbs/sq ft or 169 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.91
      - Longitudinal: 2.30
      - Overall: 1.00
   Excellent 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

Misc Distribution
--Below Water (75t)
----13t Electric Drives
----25 Additional Crew Birthing (Aimed to allow for more effective operations over a 24h period with fresh bodies)
----35t Structural Reinforcement (to minimize damage from near-miss explosions)
----2t Construction Reserve
--Above Water (50t)
----25t LR Wireless
----25 Additional Crew Birthing (Aimed to allow for more effective operations over a 24h period with fresh bodies)
--On Deck (110t)
----1t 1912 Fire Control
----50t Minesweeping Equipment
----50t Mines
----9t Construction Reserve
--Above Deck (15t)
----10t Additional Searchlights
----5t Improved Signaling Equipment

[snip]

By the end of 1923H1, the twenty pre-1921 built ships were updated to 1918 Fire Control. Ships built since 1921H1 were equipped with 1918 Fire Control as built.