WesWorld

Transmarchilay
Transmarchilay is a ferry line which operates four ferries in service between Puerto Montt and various locations in Chiloe and southern Chile.

Ferries
- Ancud
- Castro
- Pincoya
- Chaitén

Ancud-class, Chilean Ramped Ferry laid down 1940

Displacement:
550 t light; 564 t standard; 709 t normal; 825 t full load

Dimensions: Length overall / water x beam x draught
210.82 ft / 203.00 ft x 34.00 ft x 7.00 ft (normal load)
64.26 m / 61.87 m x 10.36 m x 2.13 m

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 1,142 shp / 852 Kw = 15.00 kts
Range 6,000nm at 15.00 kts
Bunker at max displacement = 261 tons

Complement:
68 - 89

Cost:
£0.141 million / $0.565 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Machinery: 31 tons, 4.3 %
Hull, fittings & equipment: 269 tons, 38.0 %
Fuel, ammunition & stores: 159 tons, 22.4 %
Miscellaneous weights: 250 tons, 35.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2,284 lbs / 1,036 Kg = 21.1 x 6 " / 152 mm shells or 1.3 torpedoes
Stability (Unstable if below 1.00): 1.19
Metacentric height 1.4 ft / 0.4 m
Roll period: 12.2 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.87

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.514
Length to Beam Ratio: 5.97 : 1
'Natural speed' for length: 16.98 kts
Power going to wave formation at top speed: 48 %
Trim (Max stability = 0, Max steadiness = 100): 38
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 2.00 ft / 0.61 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 16.00 ft / 4.88 m
- Forecastle (20 %): 11.00 ft / 3.35 m
- Mid (50 %): 11.00 ft / 3.35 m
- Quarterdeck (15 %): 11.00 ft / 3.35 m
- Stern: 11.00 ft / 3.35 m
- Average freeboard: 11.40 ft / 3.47 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 53.4 %
- Above water (accommodation/working, high = better): 149.2 %
Waterplane Area: 4,844 Square feet or 450 Square metres
Displacement factor (Displacement / loading): 228 %
Structure weight / hull surface area: 39 lbs/sq ft or 191 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 2.67
- Overall: 1.04
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, rides out heavy weather easily

Ships in Class:
- Ancud
- Castro
- Pincoya
- Chaitén

Conversion Commission notes for War Use:
These vessels were developed from bow-ramped tank landing ship proposed 1937 for the Navy. High priority for wartime call-up to serve as amphibious landing ships; Directemar and ferry lines employ Naval reservists as captain and senior officers. 83 tons to receive Major Refit to carry AA guns (3" + 40mm + 20mm), armoured bow ramp, and armoured conn.