501 (Forth) Coast Regiment RA (TA) was formed from a part of Forth Heavy Regiment RA (TA), in July 1940. The Regiment became part of Cromarty Fire Command in December 1944. It was placed in suspended animation with two batteries in June 1945, the remaing four batteries were disbanded. 501 (Forth) Coast Regiment RA (TA) was reconstituted in January 1947 as 412 (Highland) Coast Regiment RA (TA).
Illustrations of the formation badges under which a unit served or supported are given. This is no guarantee that the unit used this formations badge.
| Jul 40 | Formed from part of Forth Heavy Regiment | Cromarty, Ross and Cromarty, UK | |
| Jul 40 |  |
Scottish Command | Cromarty, Ross and Cromarty, UK |
| Jun 45 | Suspended animation |
Batteries
| Jul 40 | A (North Sutor), B (South Sutor) |
| Dec 40 | A, B, 303 (Wick), 304 (Nigg), 382 |
| May 41 | 211, 227 (Lossiemouth), 241 (North Sutor), 242 (South Sutor), 303, 304 |
| Mar 42 | 211, 227, 241, 244, 306, 307, 82 Coast Observer Detachment |
| Sep 42 | 211, 227, 243, 244, 306, 307, 82 Coast Observer Detachment |
| Apr 44 | 154, 211, 227, 243, 306, 307, 82 Coast Observer Detachment |
Equipment
| Jul 40 | 3 x 9.2 inch Guns, 12 x 6 inch Guns, 4 x 12 pdr QF Guns |