Specifications also listed HERE as Submarine Support Vessel.
Almirante José Toribio Merino Saavedra-class, Chilean Multipurpose Auxiliary laid down 1940
These three vessels are designed as "multi-purpose" support ships, and can be quickly converted to serve as submarine motherships, minelayers, infantry landing ships, seaplane tenders, or other various roles. This depends almost completely on the general stores they carry, and the ships are visually identical. The lead vessel,
Almirante José Toribio Merino Saavedra, will be assigned as a submarine mothership, while
Ministro Zentento and
Presidente Errazuriz will be assigned as infantry landing ships.
Displacement:
2,650 t light; 2,759 t standard; 3,500 t normal; 4,093 t full load
Dimensions: Length overall / water x beam x draught
352.25 ft / 344.49 ft x 48.23 ft x 13.12 ft (normal load)
107.37 m / 105.00 m x 14.70 m x 4.00 m
Armament:
4 - 4.33" / 110 mm guns in single mounts, 40.61lbs / 18.42kg shells, 1940 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.88kg shells, 1940 Model
Anti-aircraft guns in deck mounts
on centreline, all aft, all raised mounts - superfiring
6 - 0.79" / 20.0 mm guns (2x3 guns), 0.24lbs / 0.11kg shells, 1940 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 172 lbs / 78 kg
Shells per gun, main battery: 400
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.79" / 20 mm 0.79" / 20 mm
2nd: 0.79" / 20 mm 0.39" / 10 mm -
3rd: 0.59" / 15 mm 0.39" / 10 mm -
- Conning tower: 1.18" / 30 mm
Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 3,857 shp / 2,878 Kw = 16.00 kts
Range 11,500nm at 15.00 kts
Bunker at max displacement = 1,333 tons
Complement:
226 - 295
Cost:
£0.751 million / $3.005 million
Distribution of weights at normal displacement:
Armament: 21 tons, 0.6 %
Armour: 21 tons, 0.6 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 15 tons, 0.4 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 6 tons, 0.2 %
Machinery: 103 tons, 2.9 %
Hull, fittings & equipment: 1,104 tons, 31.5 %
Fuel, ammunition & stores: 850 tons, 24.3 %
Miscellaneous weights: 1,400 tons, 40.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
7,705 lbs / 3,495 Kg = 189.7 x 4.3 " / 110 mm shells or 2.0 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 2.0 ft / 0.6 m
Roll period: 14.2 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.11
Seaboat quality (Average = 1.00): 1.94
Hull form characteristics:
Hull has low forecastle, low quarterdeck
Block coefficient: 0.562
Length to Beam Ratio: 7.14 : 1
'Natural speed' for length: 18.56 kts
Power going to wave formation at top speed: 39 %
Trim (Max stability = 0, Max steadiness = 100): 36
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.33 ft / 6.50 m
- Forecastle (20 %): 12.37 ft / 3.77 m (18.04 ft / 5.50 m aft of break)
- Mid (50 %): 14.76 ft / 4.50 m
- Quarterdeck (15 %): 8.20 ft / 2.50 m (14.76 ft / 4.50 m before break)
- Stern: 9.02 ft / 2.75 m
- Average freeboard: 14.57 ft / 4.44 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 59.5 %
- Above water (accommodation/working, high = better): 153.4 %
Waterplane Area: 11,724 Square feet or 1,089 Square metres
Displacement factor (Displacement / loading): 195 %
Structure weight / hull surface area: 64 lbs/sq ft or 311 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.71
- Overall: 1.01
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, can fire her guns in the heaviest weather
Breakdown of Miscellaneous Weights (as BDI):
- 75 tons for 6 Landing Craft Assault (12.5 tons each)
- 70 tons for 2 Landing Craft Mechanized (35 tons each)
- 876 tons for 438 troops
- 50 tons for working crane
- 329 tons for associated gear
(Note 1: as LSI(M), ship is not intended to beach during assault operations.)
Breakdown of Miscellaneous Weights (as BMS):
- 462 tons for spare crew quarters and recreational areas
- 200 tons for engineering workshop
- 200 tons for torpedo workshop
- 50 tons for working crane
- 488 for spare ammo and torpedoes
Breakdown of Miscellaneous Weights (as Seaplane Tender):
- 462 tons for spare crew quarters and recreational areas
- 200 tons for engineering workshop
- 200 tons for aircraft workshop
- 50 tons for working crane
- 488 for spare ammo, parts, bombs and torpedoes
Breakdown of Miscellaneous Weights (as Minelayer):
- 1200 tons for mines
- 150 tons for mine-launching rails
- 50 tons for working crane
Notes:
Ship was designed with canoe stern to serve better as minelayer.
Ships in Class:
-
Almirante José Toribio Merino Saavedra (Submarine Mothership) - 1940
-
Ministro Zentento (Landing Ship Infantry (Medium)) - 1941
-
Presidente Errazuriz (Landing Ship Infantry (Medium)) - 1941
Ship design started out as a 'backsim' of the Swedish ship Visborg.