Preceded by:
NoneSucceeded by:
None| Ship | Code | Builder | Laid | Launch | Comm | Decomm | Fate | ||
 |
Hengam | 511 | Yarrow | 1972 | 27/09/1973 | 12/08/1974 | - | Active | |
|
Larak | 512 | Yarrow | 1973 | 07/05/1974 | 12/11/1974 | - | Active | |
|
Lavan | 513 | Yarrow | 06/02/1978 | 27/02/1979 | 16/01/1985 | - | Active | |
|
Tonb | 514 | Yarrow | - | 06/12/1979 | 21/02/1985 | - | Active | |
|
(Unnamed) | Yarrow | - | - | - | - | Cancelled | ||
|
(Unnamed) | Yarrow | - | - | - | - | Cancelled |