German submarine U-984

German submarine U-984 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II. She was laid down on 7 September 1942 by Blohm & Voss, Hamburg as yard number 184, launched on 12 May 1943 and commissioned on 17 June 1943 under Oberleutnant zur See Heinz Sieder.

Service History
The boat's career began with training at 5th U-boat Flotilla on 17 June 1943, followed by active service on 1 August 1944 as part of the 9th Flotilla for the remainder of her service.

On 22 January 1944, Maschinenobergefreiter Hermann Keller was lost overboard in the North Atlantic.

On 8 June 1944, U-984 was bombed by an unidentified Allied aircraft and was sufficiently damaged to force a return to base on 9 June

In 5 patrols she accounted for the total loss of 3 merchant ships, for a total of, one warship total loss (1,300 tons) and damaged one other merchant ship.

Wolfpacks
U-984 took part in four wolfpacks, namely
 * Rügen (14–26 January 1944)
 * Stürmer (26 January - 3 February 1944)
 * Igel 1 (3–17 February 1944)
 * Dragoner (22–27 May 1944)

Fate
U-984 was sunk on 20 August 1944 in the North Atlantic in the Bay of Biscay in position 48.26667°N, -5.55°W, by depth charges from Canadian destroyers HMCS Ottawa (H31), HMCS Kootenay (H75) and HMCS Chaudiere (H99). All hands were lost.