The Regiments initially consisted of of a Headquarters and three specialist batteries, one each for Survey, Sound Ranging and Flash Spotting. This was changed later in the war to a two battery system with a troop of each speciality in each battery.
1939
| Regimental Headquarters |
| Survey Battery |
| Sound Ranging Battery |
| Flash Spotting Battery |
1943
| Observation Troop | Sound Ranging Troop | Survey Troop |
| Battery |
| Observation Troop | Sound Ranging Troop | Survey Troop |