O/P class destroyer

British O/P-class destroyer HMS Pathfinder (G10).

The O and P-class was a class of destroyers of the British Royal Navy. Ordered in 1939, they were the first ships in the War Emergency Programme, also known as the 1st and 2nd Emergency Flotilla, respectively. They served as convoy escorts in World War II, and some were later converted to fast first-rate anti-submarine frigates in the 1950s.

Specifications

O-class

• Type: Destroyer
• Service Period: 1941-1949
• Characteristics:
  • Length: 345 feet (105.16 meters)
  • Beam: 35 feet (10.67 meters)
  • Draft: 9 feet (2.74 meters)
  • Displacement: 1,610 tons (Standard); 2,270 tons (Full Load)
• Crew: 176 (217 in flotilla leader)
• Propulsion: 2 x Admiralty 3-drum water-tube boilers, 2 x Parsons geared steam turbines, 2 x shafts, 40,000 shp (30,000 kW)
• Range: 3,850 nautical miles (7,130.2 kilometers) at 20 knots (37.04 km/h)
• Speed: 36.75 knots 68.06 km/h)
• Armament:
  • 5 x QF 4.7"/45-caliber Mk.IX/XII (5x1)
  • 16 x QF 40mm/39-caliber Mk.VIII anti-aircraft guns (4x4)
  • 6 x QF 20mm Oerlikon anti-aircraft cannons (6x1)
  • 4 x 21" torpedo tubes (1x4)

P-class

• Type: Destroyer
• Service Period: 1941-1949
• Characteristics:
  • Length: 345 feet (105.16 meters)
  • Beam: 35 feet (10.67 meters)
  • Draft: 9 feet (2.74 meters)
  • Displacement: 1,610 tons (Standard); 2,250 tons (Full Load)
• Crew: 176 (217 in flotilla leader)
• Propulsion: 2 x Admiralty 3-drum water-tube boilers, 2 x Parsons geared steam turbines, 2 x shafts, 40,000 shp (30,000 kW)
• Range: 3,850 nautical miles (7,130.2 kilometers) at 20 knots (37.04 km/h)
• Speed: 36.75 knots 68.06 km/h)
• Armament:
  • 5 x QF 4"/45-caliber Mk.V/XVI dual purpose naval guns (5x1)
  • 16 x QF 40mm/39-caliber Mk.VIII anti-aircraft guns (4x4)
  • 6 x QF 20mm Oerlikon anti-aircraft cannons (6x1)
  • 4 x 21" torpedo tubes (1x4)
  • 4 x depth charge throwers and 2 x depth charge racks for 70 depth charges

Unit Run

O-class

• HMS Onslaught (G04) - transferred to Royal Indian Navy in 1951, renamed HMIS Tughril
• HMS Onslow (G17) - transferred to Royal Indian Navy in 1949, renamed HMIS Tippu Sultan
• HMS Offa (G29) - transferred to Royal Indian Navy in 1949, renamed HMIS Tariq
• HMS Obdurate (G39)
• HMS Obedient (G48)
• HMS Observer (G57)
• HMS Oribi (G66) - sold to Turkey in 1946, renamed TCG Gayret
• HMS Oppurtune (G80)
• HMS Orwell (G98)

P-class

• HMS Pakenham (G06)
• HMS Pathfinder (G10)
• HMS Pellew (G19)
• HMS Persistent (G28)
• HMS Partridge (G30)
• HMS Pique (G35)
• HMS Panther (G41)
• HMS Petard (G56)
• HMS Paladin (G69)
• HMS Penn (G77)
• HMS Porcupine (G93)