Due to a bombing raid in August 1940 the main Naval Anti-Submarine training base HMS Osprey at Portsmouth was badly damaged. For once wisdom came to their Lordships and it was decided that training should take place in a less vulnerable place. Campbletown in Scotland fitted the bill so the Grammar School was requisitioned and a new set of pupils were moved in, Navy personnel training on ASDIC. HMS Nimrod came into being. Due to the large influx of personnel a new housing estate was also requisitioned for accommodation for HMS Nimrod, this section was given the name of Nimrod- B.
In a very short time Campbeltown was soon to become a Military Base of a great size. It would have in the end HMS Nimrod Anti-submarine training, HMS Landrail Fleet Air Arm, a Rescue Tug Base also Air/Sea Rescue, plus a boom defence unit.
Due to the large size of the ASDIC training personnel HMS Seahawk at Ardrishaig quickly came into being as a tender to HMS Nimrod.
Officers in charge of HMS Nimrod
06.1940 - ( ? ) Cdr R J R Dendy
06.1941 - ( ? ) Capt C T Addis
02.1942 - (08.1943) Capt. J.W. Farquhar, RN
08.1943 - (12.1943) Capt. M.W.St.L. Searle, RN
01.1944 - (06.1944) Capt. D.H. Hall-Thompson, RN
04.1945 - (07.1945) A/Capt. A.E. Johnston, RN (retd)