P 4-class torpedo boat

P 4 class torpedo boat

Decommissioned P 4-class torpedo boat of the Bangladesh Navy. Preserved at the Bangladesh Military Museum.
Class overview
Name	Project 123-bis "Komsomolets" torpedo boat Project 123-K "Komsomolets" torpedo boat
Builders	Shipyard No.609, Tyumen Shipyard No.831, Feodosia
Operators	Soviet Navy  Albanian Naval Force  Bangladesh Navy  Bulgarian Navy  Benin Navy  People's Liberation Army Navy  Cuban Revolutionary Navy  Cyprus Navy  Egyptian Navy  Iraqi Navy  Israeli Navy  Korean People's Navy  Romanian Naval Forces  Syrian Arab Navy  Somali Navy  Tanzania Naval Command  Vietnam People's Navy  Yemeni Navy  Zairian Navy[1]
Preceded by	D3 class
Succeeded by	P-6 class
Built	1944–1955
Completed	~336[1]
General characteristics
Type	Motor torpedo boat
Displacement	22 tonnes (22 long tons)
Length	18.70 m (61 ft 4 in) (B-123) 19.26 m (63 ft 2 in) (K-123)
Beam	3.40 m (11 ft 2 in)
Draft	1.0 m (3 ft 3 in)
Propulsion	2 × Soviet M-50 diesel engines, 2,400 hp (1,790 kW), 2 shafts
Speed	46–55 knots (85–102 km/h; 53–63 mph)
Range	500 nmi (930 km; 580 mi)
Complement	7-12
Sensors and processing systems	1 × Soviet I band Zarnitsa (Skin Head) navigational radar (K-123 only)
Armament	2 × 450 mm (17.7 in) torpedoes 2 × 2 12.7 mm (0.50 in) DShK heavy machine guns or 1 x 2 14.5 mm (0.57 in) KPV heavy machine guns [2] 6 × BM-1 depth charges [1]

The P 4-class torpedo boat, Soviet designations Project 123-bis and Project 123-K, commonly called the Komsomolets class (Russian: Комсомолец, a male member of the Komsomol), were Soviet aluminum-hulled torpedo boats. They were armed with twin heavy machine guns and two 450 mm (17.7 in) torpedoes. A large number of them were exported to allied states such as North Vietnam and China. They saw service in a variety of conflicts including World War II, the First Taiwan Strait Crisis, the Vietnam War and the Turkish Invasion of Cyprus.

The P 4 torpedo boats consisted of two primary types; the Project 123-bis (B-123) type with 12.7-millimetre (0.50 in) machine guns, and the Project 123-K (K-123) type with added radar and 14.5-millimetre (0.57 in) machine guns.