1 Survey Regiment RA was formed in May 1939 at Larkhill by splitting 1 Survey Battery into A & B Batteries. In March 1945 a third battery was added by conversion of 20 Field Radar Battery into 20 Survey Battery. In February 1946 the Regiment was re-organised into two Groups, a Survey Group with 41 & 42 Batteries and a Location Group with 20 & 63 Batteries. 1 Survey Regiment RA was re-designated 94 Observation Regiment RA in April 1947.
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.
| May 39 | Formed from expanded 1 Survey Battery | Larkhill, Wiltshire, UK | |
| Sep 39 |  |
1 Corps | Larkhill, Wiltshire, UK |
| Nov 39 | British Expeditionary Force | France | |
| May 40 | Home Forces | UK | |
| Nov 42 |  |
Middle East Forces | Palestine |
| May 43 |  |
PAI Force – (Palestine & Iraq) | Iraq |
| Mar 43 |  |
9 Army | Palestine |
| Jun 44 | |
Middle East Forces | Egypt |
| Sep 44 |  |
101 Lines of Communication | Ranchi, India |
| Feb 45 |  |
HQ ALFSEA (Allied Land Forces South East Asia) |
Burma (Myanmar) |
| Mar 45 |  |
4 Corps | Burma (Myanmar) |
Batteries
| Sep 39 | A, B |
| Jun 43 | A1, B1 |
| Nov 44 | 41, 42 |
| Mar 45 | 20, 41, 42 |