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). The first 3GM conversion started 15Jan86 on XZ230 (15 HAS.3 aircraft were converted to HAS.3GM with 13 of these being converted to HAS.3SGM later (S = secure speach) and a further 4 HAS.3S aircraft were converted to HAS.3SGM.
Airframes (10)
| C/N | Model | Built | Reg | |
|---|---|---|---|---|
| 001 | has.2 | 1976 |  XZ227 | |
| 002 | has.2 | 1976 | XZ228 | 407 |
| 004 | has.2 | 1976 | XZ229 | |
| 005 | has.2 | 1976 | XZ230 | 751-VL |
| 128 | has.2 | 1979 | XZ694 | |
| 166 | has.2 | 1980 | XZ720 | 410-GC |
| 186 | has.2 | 1980 | XZ724 | 336-CV |
| 210 | has.2 | 1981 | XZ733 | 404-IR |
| 257 | has.3 | 1982 | ZD253 | 304 |
| 265 | has.3 | 1982 | ZD256 |
Operators
| 1976-2017 | Fleet Air Arm Lynx |