WesWorld

HL65 type 1, Greek Harbor Launch/Net Tender laid down 1938/1941-42

HL-1 through HL-18.


Displacement:
65 t light; 71 t standard; 78 t normal; 83 t full load

Dimensions: Length overall / water x beam x draught
51.70 ft / 50.00 ft x 21.50 ft x 5.00 ft (normal load)
15.76 m / 15.24 m x 6.55 m x 1.52 m

Armament:
1 - 1.57" / 40.0 mm guns in single mounts, 2.00lbs / 0.91kg shells, 1938 Model
Anti-aircraft gun in deck mount
on centreline forward
2 - 0.79" / 20.0 mm guns in single mounts, 0.25lbs / 0.11kg shells, 1938 Model
Anti-aircraft guns in deck mounts
on side, all amidships
Weight of broadside 3 lbs / 1 kg
Shells per gun, main battery: 2,500

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.50" / 13 mm 0.25" / 6 mm -
2nd: 0.50" / 13 mm - -

Machinery:
Diesel Internal combustion motors,
Direct drive, 1 shaft, 80 shp / 59 Kw = 8.75 kts
Range 2,200nm at 8.75 kts
Bunker at max displacement = 12 tons

Complement:
13 - 17

Cost:
£0.016 million / $0.064 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.4 %
Armour: 0 tons, 0.6 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 0 tons, 0.6 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 2 tons, 2.8 %
Hull, fittings & equipment: 32 tons, 41.6 %
Fuel, ammunition & stores: 13 tons, 16.2 %
Miscellaneous weights: 30 tons, 38.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
173 lbs / 79 Kg = 88.6 x 1.6 " / 40 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 0.6 ft / 0.2 m
Roll period: 11.7 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 1.15

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.508
Length to Beam Ratio: 2.33 : 1
'Natural speed' for length: 7.07 kts
Power going to wave formation at top speed: 69 %
Trim (Max stability = 0, Max steadiness = 100): 43
Bow angle (Positive = bow angles forward): 5.00 degrees
Stern overhang: 1.00 ft / 0.30 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 8.00 ft / 2.44 m
- Forecastle (20 %): 7.00 ft / 2.13 m
- Mid (30 %): 7.00 ft / 2.13 m (6.00 ft / 1.83 m aft of break)
- Quarterdeck (15 %): 6.00 ft / 1.83 m
- Stern: 6.00 ft / 1.83 m
- Average freeboard: 6.38 ft / 1.94 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 60.6 %
- Above water (accommodation/working, high = better): 62.6 %
Waterplane Area: 694 Square feet or 65 Square metres
Displacement factor (Displacement / loading): 209 %
Structure weight / hull surface area: 32 lbs/sq ft or 154 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.19
- Longitudinal: 18.32
- Overall: 1.56
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is cramped