Creek (River Gunboat)

[TacCovert4]

Creek, Aztec Gunboat laid down 1923

Displacement:
   177 t light; 192 t standard; 202 t normal; 210 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (114.83 ft / 114.83 ft) x 18.04 ft x (5.25 / 5.42 ft)
   (35.00 m / 35.00 m) x 5.50 m  x (1.60 / 1.65 m)

Armament:
      1 - 5.12" / 130 mm 45.0 cal gun - 67.61lbs / 30.67kg shells, 200 per gun
     Quick firing gun in deck mount, 1922 Model
     1 x Single mount on centreline, forward deck centre
      6 - 1.18" / 30.0 mm 50.0 cal guns - 0.86lbs / 0.39kg shells, 1,000 per gun
     Anti-air guns in deck and hoist mounts, 1922 Model
     3 x Twin mounts on sides, forward deck aft
      6 - 0.47" / 12.0 mm 70.0 cal guns - 0.07lbs / 0.03kg shells, 2,000 per gun
     Machine guns in deck mounts, 1922 Model
     6 x Single mounts on sides, evenly spread
      Weight of broadside 73 lbs / 33 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.18" / 30 mm   0.59" / 15 mm            -
   2nd:   0.79" / 20 mm         -         0.79" / 20 mm
   3rd:   0.59" / 15 mm         -               -

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

   - Conning towers: Forward 1.18" / 30 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 816 shp / 609 Kw = 15.00 kts
   Range 1,500nm at 10.00 kts
   Bunker at max displacement = 18 tons

Complement:
   26 - 34

Cost:
   £0.039 million / $0.157 million

Distribution of weights at normal displacement:
   Armament: 14 tons, 7.1 %
      - Guns: 14 tons, 7.1 %
   Armour: 48 tons, 23.7 %
      - Armament: 13 tons, 6.6 %
      - Armour Deck: 34 tons, 16.7 %
      - Conning Tower: 1 tons, 0.4 %
   Machinery: 28 tons, 13.7 %
   Hull, fittings & equipment: 54 tons, 26.9 %
   Fuel, ammunition & stores: 25 tons, 12.2 %
   Miscellaneous weights: 33 tons, 16.3 %
      - Hull below water: 20 tons
      - Hull above water: 2 tons
      - On freeboard deck: 9 tons
      - Above deck: 2 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     319 lbs / 145 Kg = 4.8 x 5.1 " / 130 mm shells or 0.4 torpedoes
   Stability (Unstable if below 1.00): 1.23
   Metacentric height 0.6 ft / 0.2 m
   Roll period: 10.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 60 %
         - Recoil effect (Restricted arc if above 1.00): 0.46
   Seaboat quality  (Average = 1.00): 1.00

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.650 / 0.654
   Length to Beam Ratio: 6.36 : 1
   'Natural speed' for length: 10.72 kts
   Power going to wave formation at top speed: 66 %
   Trim (Max stability = 0, Max steadiness = 100): 60
   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 %,  7.55 ft / 2.30 m,  7.22 ft / 2.20 m
      - Forward deck:   30.00 %,  7.22 ft / 2.20 m,  6.96 ft / 2.12 m
      - Aft deck:   35.00 %,  6.96 ft / 2.12 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:      6.95 ft / 2.12 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 80.4 %
      - Above water (accommodation/working, high = better): 80.4 %
   Waterplane Area: 1,587 Square feet or 147 Square metres
   Displacement factor (Displacement / loading): 114 %
   Structure weight / hull surface area: 25 lbs/sq ft or 120 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.78
      - Longitudinal: 3.35
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Excellent machinery, storage, compartmentation space
   Cramped accommodation and workspace room

2t - 1918 FC

20t - Quarters for 10 Marines or 80 temporary PAX

8t - 2 x 2t flat-bottomed skiff

1t - Strengthened Deck Plate for mounting of infantry mortar x 2

2t - Arms locker for Infantry mortars and ammunition