HMS Orchis (K76)
Underway in the River Clyde, December 1942
|Laid down:||18 June 1940|
|Launched:||15 October 1940|
|Commissioned:||29 November 1940|
|Identification:||Pennant number: K76|
|Fate:||Mined off Juno Beach 21 August 1944|
|Class & type:||Flower-class corvette|
|Displacement:||925 long tons|
|Length:||205 ft (62 m) o/a|
|Beam:||33 ft (10 m)|
|Draught:||11 ft 6 in (3.51 m)|
|Propulsion:||1 × 4-cycle triple-expansion reciprocating steam engine
2 × fire tube Scotch boilers
2,750 ihp (2,050 kW)
|Speed:||16 kn (30 km/h)|
|Range:||3,500 nmi (6,500 km) at 12 kn (22 km/h)|
|1 × Type 271 radar from March 1941
1 × Type 123A or Type 127DV sonar
|Operations:||Battle of the Atlantic|
North Atlantic Trade Convoy Escort
In March 1941, Orchis was the first ship fitted with the very successful 10-cm wavelength Type 271 radar enabling detection of a surfaced submarine at 5000 yards or a submarine periscope at 1300 yards. Orchis was assigned first to the 4th Escort Group based at Greenock and then to Escort Group B3 of the Mid-Ocean Escort Force through early 1944. Orchis escorted convoy ONS-18 during the battle of Convoys ONS-18/ON-202.
Orchis was then assigned to patrol the English Channel, and sank German submarine U-741 on 15 August 1944. U-741 torpedoed LST-404 of convoy FTM-69 while Orchis was escorting nearby convoy FTC-68. Orchis gained and held sonar contact on U-741 and flooded the forward part of the U-boat with two Hedgehog attacks and two Depth charge attacks. Leo Leuwer escaped from the aft torpedo-room hatch of the sunken U-boat, and was rescued by Orchis.
- Macintyre, Donald, CAPT RN "Shipborne Radar" United States Naval Institute Proceedings September 1967 p.80
- Blair, Clay (1998). Hitler's U-boat War The Hunted 1942-1945. Random House. ISBN 0-679-45742-9.
- Brown, David (1995) . Warship Losses of World War Two. Naval Institute Press. ISBN 1-55750-914-X.
- Rohwer, Jurgen; Hummelchen, Gerhard (1992) . Chronology of the War at Sea 1939-1945. Naval Institute Press. ISBN 1-55750-105-X.