She was bombed and sunk off St. Peter Port, Guernsey, Channel Islands on 24 July 1944.

The engine powered a single screw propeller driven via a geared low pressure turbine.

[3] The Code Letters KSBT were allocated,[2] as was the fishing boat registration PG 383.

[4] On 23 December 1939, Dr. Rudolf Wahrendorff was requisitioned by the Kriegsmarine for use as a vorpostenboot.

[5] Dr. Rudolf Wahrendorff was bombed and sunk by Grumman Avenger aircraft of 850 Naval Air Squadron, Fleet Air Arm off Saint Peter Port, Guernsey, Channel Islands (49°27′N 2°32′W / 49.450°N 2.533°W / 49.450; -2.533) on 24 July 1944.