A small inspection Cutter

[ledeper]

Inspectioncutter,Baltic Federation, Inpection Cutter laid down 1908

Displacement:
   77 t light; 79 t standard; 80 t normal; 80 t full load

Dimensions: Length overall / water x beam x draught
   52,63 ft / 52,49 ft x 19,69 ft x 6,56 ft (normal load)
   16,04 m / 16,00 m x 6,00 m  x 2,00 m

Armament:
      1 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,89kg shells, 1908 Model
     Quick firing gun in deck mount
     on centreline forward
   Weight of broadside 2 lbs / 1 kg
   Shells per gun, main battery: 150

Machinery:
   Diesel Internal combustion motors,
   Direct drive, 1 shaft, 63 shp / 47 Kw = 8,50 kts
   Range 500nm at 4,00 kts
   Bunker at max displacement = 1 tons

Complement:
   13 - 17

Cost:
   £0,003 million / $0,013 million

Distribution of weights at normal displacement:
   Armament: 0 tons, 0,3 %
   Machinery: 3 tons, 4,0 %
   Hull, fittings & equipment: 74 tons, 92,6 %
   Fuel, ammunition & stores: 2 tons, 3,1 %
   Miscellaneous weights: 0 tons, 0,0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     524 lbs / 238 Kg = 268,3 x 1,6 " / 40 mm shells or 1,9 torpedoes
   Stability (Unstable if below 1.00): 1,15
   Metacentric height 0,6 ft / 0,2 m
   Roll period: 11,0 seconds
   Steadiness   - As gun platform (Average = 50 %): 67 %
         - Recoil effect (Restricted arc if above 1.00): 0,01
   Seaboat quality  (Average = 1.00): 1,34

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,412
   Length to Beam Ratio: 2,67 : 1
   'Natural speed' for length: 7,25 kts
   Power going to wave formation at top speed: 63 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 1,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      7,97 ft / 2,43 m
      - Forecastle (20 %):   5,09 ft / 1,55 m
      - Mid (50 %):      5,09 ft / 1,55 m
      - Quarterdeck (15 %):   5,09 ft / 1,55 m
      - Stern:      5,09 ft / 1,55 m
      - Average freeboard:   5,32 ft / 1,62 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 17,2 %
      - Above water (accommodation/working, high = better): 45,2 %
   Waterplane Area: 607 Square feet or 56 Square metres
   Displacement factor (Displacement / loading): 958 %
   Structure weight / hull surface area: 76 lbs/sq ft or 372 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 2,96
      - Longitudinal: 40,30
      - Overall: 3,84
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is extremely poor
   Good seaboat, rides out heavy weather easily

        For use in the Arctic,fishery-survey and exploration.

[Sachmle]

Do you have disel tech sufficent for this? Also, your composite strength is way to high, 1.00 is the preferred, but considering the size of this ship you can go as low as .50 as long as the cross-sectional strength is also 0.50. Maybe increase speed or range add some 20mm machine guns and some misc weight for a W/T.

[P3D]

A 77t boat will have serious difficulties in the North Atlantic.
The 0.50 cross-sectional strength is allowed only for fast (25kts+) vessels.

[The Rock Doctor]

I like the idea for a revenue cutter, but if it's to be ocean-going, I agree it needs to be larger.  I have such a vessel in the Gran Colombian Encyclopedia, under "Patrol Vessels".  Still, even if it's not large enough for ocean-going work, it'd still be a useful harbour vessel.

The hull would seem more sensible with less beam and more block-co-efficient. 

A top speed of around 12-13 knots might be good so that she can catch up with merchants in the area.

If the weight can be spared for it, a short-range wireless (5 t) might be useful.