Orsa-class torpedo boat

Torpedo boat Pegaso
Class overview
Operators	Regia Marina  Italian Navy
In commission	1936–1964
Completed	4
Lost	2
General characteristics [1]
Type	Torpedo boat
Displacement	840 long tons (853 t) standard 1,575 long tons (1,600 t) full load
Length	82.5 m (270 ft 8 in)
Beam	9.69 m (31 ft 9 in)
Draught	3.74 m (12 ft 3 in)
Propulsion	2 shaft steam turbines 2 boilers 16,000 hp (11,900 kW)
Speed	28 knots (32 mph; 52 km/h)
Complement	116
Electronic warfare & decoys	Sonar
Armament	2 × 100 mm (4 in) / 47 caliber guns 10 × 20 mm (0.79 in) anti-aircraft guns 8 × 13.2 mm (0.52 in) AA machine guns 4 × 450 mm (18 in) torpedo tubes[2] 6 × depth charge throwers

The Orsa class (sometimes called the Pegaso class) were a group of large torpedo boats or destroyer escorts built for the Italian Navy in the late 1930s. They were an enlarged version of the Spica-class torpedo boat, specifically tailored for the escort and anti-submarine role, with greater endurance and a heavier depth charge armament but less powerful machinery and a lighter gun armament. Four were built, with two being lost during the Second World War. The surviving pair were rebuilt as anti-submarine frigates in the 1950s.