Convoy ON 166

Convoy ON 166
Part of Battle of the Atlantic

A depth charge being loaded onto a depth-charge thrower aboard the corvette HMS Dianthus
Date20–25 February 1943
Location
Result German tactical victory
Belligerents
 United Kingdom
 United States
 Canada
Poland
 Germany
Commanders and leaders
CAPT W E B Magee RN
CAPT P.R. Heineman USN
Admiral Karl Dönitz
Strength
63 freighters
1 destroyer
2 cutters
5 corvettes
18 submarines
Casualties and losses
14 freighters sunk (87,994 GRT)
262 killed/drowned
3 submarines sunk
128 killed/drowned
11 captured

Convoy ON 166 was the 166th of the numbered ON series of merchant ship convoys Outbound from the British Isles to North America. Sixty-three ships departed Liverpool 11 February 1943 and were met the following day by Mid-Ocean Escort Force Group A-3 consisting of the Treasury-class cutters Campbell and Spencer and the Flower-class corvettes Dianthus, Chilliwack, Rosthern, Trillium and Dauphin.