Date[4] Ship[4] Nationality[4] Tonnage[Note 1][4] Fate and location[4] 6 July 1942 John Witherspoon United States 7,191 Sunk at 72°05′N 40°30′E﻿ / ﻿72.083°N 40.500°E﻿ / 72.083; 40.500﻿ (John Witherspoon (ship)) 7 July 1942 Alcoa Ranger United States 5,116 Sunk at 71°38′N 49°35′E﻿ / ﻿71.633°N 49.583°E﻿ / 71.633; 49.583﻿ (Alcoa Ranger (ship)) 8 July 1942 Olopana United States 6,069 Sunk at 72°10′N 51°00′E﻿ / ﻿72.167°N 51.000°E﻿ / 72.167; 51.000﻿ (Olopana (ship)) 13 July 1942 Paulus Potter Netherlands 7,168 Sunk at 70°00′N 52°00′E﻿ / ﻿70.000°N 52.000°E﻿ / 70.000; 52.000﻿ (Paulus Potter (ship)) 20 September 1942 Silver Sword United States 4,937 Sunk at 75°52′N 00°20′W﻿ / ﻿75.867°N 0.333°W﻿ / 75.867; -0.333﻿ (Silver Sword(ship)) 26 January 1943 Krasnyj Partizan Soviet Union 2,418 Sunk at 73°45′N 17°30′E﻿ / ﻿73.750°N 17.500°E﻿ / 73.750; 17.500﻿ (Krasnyj Partizan (ship)) 29 January 1943 Ufa Soviet Union 1,892 Sunk at 73°40′N 24°30′E﻿ / ﻿73.667°N 24.500°E﻿ / 73.667; 24.500﻿ (Ufa (ship)) 3 February 1943 Greylock United States 7,460 Sunk at 70°52′N 00°21′W﻿ / ﻿70.867°N 0.350°W﻿ / 70.867; -0.350﻿ (Greylock (ship)) 5 March 1943 Executive United States 4,978 Sunk at 72°44′N 11°27′E﻿ / ﻿72.733°N 11.450°E﻿ / 72.733; 11.450﻿ (Executive (ship)) 10 March 1943 Richard Bland United States 7,191 Total loss at 66°53′N 14°10′W﻿ / ﻿66.883°N 14.167°W﻿ / 66.883; -14.167﻿ (Richard Bland (ship)) 27 July 1943 Akademik Shokalskij Soviet Union 411 Sunk at Grid AT 3513 9 March 1944 USS Leopold (DE-319) United States Navy 1,200 Sunk at 58°44′N 25°50′W﻿ / ﻿58.733°N 25.833°W﻿ / 58.733; -25.833﻿ (USS Leopold (DE 319) (ship))