GM = Gulf Modification are aircraft given a cooling package for use in hot countries / areas such as the Persian Gulf during Iran / Iraqi war, an improved ECM, revised IFF and provision for Forward looking infrared (FLIR). 13 HAS.3GM helicopters were converted to HAS.3SGM. S = secure speach) and a further 4 HAS.3S aircraft were converted to HAS.3SGM 
List of Operators of Westland Lynx HAS3SGM | |
| From | Organisation with model Lynx HAS3SGM | |||||
| 1976 |
| |||||
Construction Numbers | Help Us | |
| C/N | Year | History | |
 | 002 | 1976 |  XZ228 |
| 004 | 1976 | XZ229 |
005  | 1976 | XZ230 | |
| 009 | 1976 | XZ232 |
| 064 | 1978 | XZ244 | |
| 135 | 1979 | XZ696 |
| 166 | 1980 | XZ720 |
| 186 | 1980 | XZ724 |
| 257 | 1982 | ZD253 |