P 6-class torpedo boat
The P 6-class torpedo boat ("Project 183 Bolshevik") is a development of the P 4-class TB originally intended to be a successor of P 4, but it instead complemented P 4 when both types served with each other. As with the P 4 class, the P 6-class also comes in two versions, one with radar and the other without, 183T and 183 respectively. The P 6 class TB is larger than the P 4-class TB, with its size increased by 3 times and being more heavily armed, with two 21-in torpedoes replacing the 18-in torpedoes of the P 4-class, and twin 25 mm gun mounts replacing the 14.5 mm gun mounts of P 4-class.[3]
Length:25.40 m (83 ft 4 in)
Width:6.24 m (20 ft 6 in)
Draft:1.24 m (4 ft 1 in)
Displacement:66.5 tonnes (65.4 long tons; 73.3 short tons) full
Max speed:44 knots (81 km/h; 51 mph) max
Endurance:1,000 nmi (1,900 km; 1,200 mi)]] at 14 knots (26 km/h; 16 mph),
600 nmi (1,100 km; 690 mi) at 33 knots (61 km/h; 38 mph)
Propulsion: four diesel engines at 1,200 hp (890 kW) each
Armaments:
Two 533 mm (21 in) torpedoes
Four 25 mm (0.98 in) guns (II x 2), with 1000 rounds of ammo
8 depth charges
Units built: 560 total (for former-USSR)

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