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''Ondina'' was one of a dozen s, the second sub-class of the 600 Series of
On 23 June 1941 ''Ondina'' under the command of Corrado Dal Pozzo at location indicated as (36.08N-34.44E) in Italian naval records. ''Ondina'' and Italian Naval records show the submarine fired a torpedo and sank the Turkish Transport vessel Refah of whom only 32 survived out of 200 on board.
''Ondina'' was also sunk a year later by the warships ''English Protea'', HMSAS ''Southern Maid'' and Walrus warplanes near Cyprus At (34-35 N, 34-56 E) on 11 July 1942. However, the command of ''Ondina'' was under Liutenant Gabriele Adolfi at that time. The Italian sailors from ''Ondina'' were recovered by the warships. (5 killed/41 survived).Italian Submarines
/ref>
Sommergibili
Marina Militare website {{DEFAULTSORT:Ondina Sirena-class submarines World War II submarines of Italy 1933 ships
coastal submarine
A coastal submarine or littoral submarine is a small, maneuverable submarine with shallow draft well suited to navigation of coastal channels and harbors. Although size is not precisely defined, coastal submarines are larger than midget submarine ...
s built for the (Royal Italian Navy) during the early 1930s.
Design and description
The ''Sirena'' class was an improved and enlarged version of the preceding s. They displaced surfaced and submerged. The submarines were long, had abeam
Beam may refer to:
Streams of particles or energy
*Light beam, or beam of light, a directional projection of light energy
**Laser beam
*Particle beam, a stream of charged or neutral particles
**Charged particle beam, a spatially localized grou ...
of and a draft
Draft, The Draft, or Draught may refer to:
Watercraft dimensions
* Draft (hull), the distance from waterline to keel of a vessel
* Draft (sail), degree of curvature in a sail
* Air draft, distance from waterline to the highest point on a vesse ...
of . Their crew numbered 45 officers and enlisted men.Chesneau, p. 309
For surface running, the boats were powered by two diesel engine
The diesel engine, named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to mechanical compression; thus, the diesel engine is a so-ca ...
s, each driving one propeller shaft
A drive shaft, driveshaft, driving shaft, tailshaft (Australian English), propeller shaft (prop shaft), or Cardan shaft (after Girolamo Cardano) is a component for transmitting mechanical power and torque and rotation, usually used to connect ...
. When submerged each propeller was driven by a electric motor
An electric motor is an electrical machine that converts electrical energy into mechanical energy. Most electric motors operate through the interaction between the motor's magnetic field and electric current in a wire winding to generate for ...
. They could reach on the surface and underwater. On the surface, the ''Sirena'' class had a range of at ; submerged, they had a range of at .Bagnasco, p. 148
The boats were armed with six torpedo tube
A torpedo tube is a cylindrical device for launching torpedoes.
There are two main types of torpedo tube: underwater tubes fitted to submarines and some surface ships, and deck-mounted units (also referred to as torpedo launchers) installed aboa ...
s, four in the bow and two in the stern for which they carried a total of 12 torpedo
A modern torpedo is an underwater ranged weapon launched above or below the water surface, self-propelled towards a target, and with an explosive warhead designed to detonate either on contact with or in proximity to the target. Historically, s ...
es. They were also armed with a single deck gun
A deck gun is a type of naval artillery mounted on the deck of a submarine. Most submarine deck guns were open, with or without a shield; however, a few larger submarines placed these guns in a turret.
The main deck gun was a dual-purpose ...
forward of the conning tower for combat on the surface. The anti-aircraft armament consisted of two or four machine gun
A machine gun is a fully automatic, rifled autoloading firearm designed for sustained direct fire with rifle cartridges. Other automatic firearms such as automatic shotguns and automatic rifles (including assault rifles and battle rifles) ar ...
s.
Construction and career
''Ondina'' waslaid down
Laying the keel or laying down is the formal recognition of the start of a ship's construction. It is often marked with a ceremony attended by dignitaries from the shipbuilding company and the ultimate owners of the ship.
Keel laying is one o ...
by Cantieri Riuniti dell'Adriatico
Cantieri Riuniti dell'Adriatico ("United Shipbuilders of the Adriatic") was an Italian manufacturer in the sea and air industry which was active from 1930 to 1966. This shipyard is now owned by Fincantieri.
History
In 1930, Stabilimento Tecnic ...
at their Monfalcone
Monfalcone (; Bisiacco: ; fur, Monfalcon; sl, Tržič; archaic german: Falkenberg) is a town and ''comune'' of the province of Gorizia in Friuli Venezia Giulia, northern Italy, located on the Gulf of Trieste. Monfalcone means 'falcon mountain ...
shipyard in 1931, launched on 2 December 1933 and completed the following year.
On 23 June 1941 ''Ondina'' under the command of Corrado Dal Pozzo at location indicated as (36.08N-34.44E) in Italian naval records. ''Ondina'' and Italian Naval records show the submarine fired a torpedo and sank the Turkish Transport vessel Refah of whom only 32 survived out of 200 on board.
''Ondina'' was also sunk a year later by the warships ''English Protea'', HMSAS ''Southern Maid'' and Walrus warplanes near Cyprus At (34-35 N, 34-56 E) on 11 July 1942. However, the command of ''Ondina'' was under Liutenant Gabriele Adolfi at that time. The Italian sailors from ''Ondina'' were recovered by the warships. (5 killed/41 survived)./ref>
Notes
References
* * * *External links
Sommergibili
Marina Militare website {{DEFAULTSORT:Ondina Sirena-class submarines World War II submarines of Italy 1933 ships