Catch-up time.
This is the trawler Rio Maranon, which was converted into service as a fisheries research vessel. She's got a limited armament for policing and wartime purposes.
Enter ship name, Enter country Enter ship type laid down 1938
Displacement:
1,021 t light; 1,051 t standard; 1,199 t normal; 1,317 t full load
Dimensions: Length overall / water x beam x draught
204.35 ft / 196.85 ft x 36.09 ft x 9.84 ft (normal load)
62.29 m / 60.00 m x 11.00 m x 3.00 m
Armament:
1 - 4.13" / 105 mm guns in single mounts, 35.32lbs / 16.02kg shells, 1938 Model
Dual purpose gun in a deck mount with hoist
on centreline forward, 1 raised gun
1 - 1.46" / 37.0 mm guns in single mounts, 1.55lbs / 0.70kg shells, 1938 Model
Anti-aircraft gun in deck mount
on centreline aft, 1 raised gun
2 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1938 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
Weight of broadside 37 lbs / 17 kg
Shells per gun, main battery: 300
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.39" / 10 mm 0.98" / 25 mm
2nd: 0.79" / 20 mm 0.39" / 10 mm -
3rd: 0.39" / 10 mm - -
Machinery:
Coal fired boilers, complex reciprocating steam engines,
Geared drive, 2 shafts, 4,000 ihp / 2,984 Kw = 17.92 kts
Range 6,000nm at 10.00 kts (Bunkerage = 265 tons)
Complement:
101 - 132
Cost:
£0.416 million / $1.664 million
Distribution of weights at normal displacement:
Armament: 5 tons, 0.4 %
Armour: 3 tons, 0.2 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 3 tons, 0.2 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 244 tons, 20.3 %
Hull, fittings & equipment: 381 tons, 31.8 %
Fuel, ammunition & stores: 178 tons, 14.8 %
Miscellaneous weights: 389 tons, 32.5 %
-105 t: Accomodation for 33 scientists and/or marine constables
-100 t: Trawl gear
-100 t: Labs and workspace
-74 t: Weight reserve/deck cargo
-10 t: Rails, Throwers, and 30 depth charges
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,490 lbs / 676 Kg = 42.2 x 4.1 " / 105 mm shells or 0.6 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 1.4 ft / 0.4 m
Roll period: 12.7 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.06
Seaboat quality (Average = 1.00): 1.64
Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.600
Length to Beam Ratio: 5.45 : 1
'Natural speed' for length: 14.03 kts
Power going to wave formation at top speed: 64 %
Trim (Max stability = 0, Max steadiness = 100): 31
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 23.95 ft / 7.30 m
- Forecastle (20 %): 21.00 ft / 6.40 m (13.12 ft / 4.00 m aft of break)
- Mid (50 %): 11.81 ft / 3.60 m
- Quarterdeck (25 %): 13.12 ft / 4.00 m
- Stern: 15.09 ft / 4.60 m
- Average freeboard: 14.82 ft / 4.52 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 104.8 %
- Above water (accommodation/working, high = better): 122.2 %
Waterplane Area: 5,196 Square feet or 483 Square metres
Displacement factor (Displacement / loading): 131 %
Structure weight / hull surface area: 43 lbs/sq ft or 209 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.82
- Longitudinal: 5.43
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Excellent seaboat, comfortable, can fire her guns in the heaviest weather