S = Secure Speech modification to Avionics, main visual difference is the tail boom lower aerial is larger than the HAS 2/3 aerial and a pointed probe on it. First conversion from a standard HAS3 to HAS3S started November 1987 on ZD268 and 67 conversions took place including the HAS3(ICE) and HAS3(GM) aircraft that were modified 
List of Operators of Lynx HAS3S |
| Years | Model | Org | |
|---|---|---|---|
| 1971/00 | Lynx |  Westland | |
| 1976/17 | Lynx | Fleet Air Arm | |
| 1993- | Lynx |  Marinha Portuguesa |
Global Distribution of Lynx HAS3S |
|
Construction Numbers |
| C/N | Year | History | |
|---|---|---|---|
| 010 | 1977 | XZ233 | |
| 019 | 1977 | XZ237 | |
| 067 | 1978 |  ,XZ245 | |
| 080 | 1978 | XZ248 | |
| 094 | 1978 | XZ254 | |
| 099 | 1978 | XZ255 | |
| 103 | 1979 | XZ257 | |
| 113 | 1979 | XZ690 | |
| 117 | 1979 | XZ691 | |
| 132 w/o 2005 | 1979 | XZ695 | |
| 199 | 1980 | XZ727 | |
| 200 w/o 1997 | 1980 | XZ728 | |
| 243 | 1981 | ZD249 | |
| 251 | 1982 | ZD251 | |
| 255 | ZD252 | ||
| 267 | 1982 | ZD257 | |
| 270 | 1982 | ZD258 | |
| 286 | 1983 | -,ZD259 | |
| 297 | 1983 | ZD262 | |
| 299 | 1983 | ZD263 | |
| 316 | 1985 | ZD565 | |
| 318 w/o 1994 | 1985 | ZD567 | |
| 334 | 1987 | -,ZF557 | |
| 335 | 1987 | -,ZF558 | |
| 336 | 1987 | 19201,ZF559,ZH580 | |
| 337 | 1987 | -,ZF560 | |
| 338 | 1988 | 19202,ZF561 | |
| 339 | 1988 | -,ZF562 | |
| 340 | 1988 | -,ZF563 |
