First anti-submarine version for the Royal Navy. 56 built. Survivors upgraded as HAS.2A, HAS/HAR/HU.5,6,7 and AEWs
Airframes (56)
| C/N | Model | Built | Reg | |
|---|---|---|---|---|
| wa 660 | has.1 | 1970 |  XV672 | 187 |
| wa 661 | has.1 | 1970 | XV673 | 144-TG |
| wa 662 | has.1 | 1970 | XV674 | 304-PW |
| wa 663 | has.1 | 1970 | XV675 | 701-PW |
| wa 664 | has.1 | 1971 | XV676 | 306-PW |
| wa 665 | has.1 | 1970 | XV677 XV677 | |
| wa 666 | has.1 | 1971 | XV695 | 303-PW |
| wa 667 | has.1 | 1971 | XV696 | 411-BL |
| wa 668 | has.1 | 1971 | XV697 | 181 |
| wa 669 | has.1 | 1971 | XV698 | 592-CU |
| wa 670 | has.1 | 1971 | XV699 | 823 |
| wa 671 | has.1 | 1971 | XV700 | ZC |
| wa 672 | has.1 | 1971 | XV701 | 268-N |
| wa 673 | has.1 | 1971 | XV702 | |
| wa 674 | has.1 | 1971 | XV703 | 052-R |
| wa 675 | has.1 | 1971 | XV704 | 181-CU |
| wa 676 | has.1 | 1971 | XV705 XV705 | 821-CU |
| wa 677 | has.1 | 1971 | XV706 XV706 | |
| wa 678 | has.1 | 1971 | XV707 | 10-PW |
| wa 679 | has.1 | 1971 | XV708 | 501-CU |
| wa 680 | has.1 | 1971 | XV709 | 263-CU |
| wa 681 | has.1 | 1972 | XV710 | 264 |
| wa 682 | has.1 | 1972 | XV711 | 011-N |
| wa 683 | has.1 | 1972 | XV712 | 66-N |
| wa 684 | has.1 | 1972 | XV713 | |
| wa 685 | has.1 | 1972 | XV714 | 188 |
Operators
| 1969-2000 | Westland Sea King |
| 1969-2018 | Fleet Air Arm Sea King |
| 1969-?? | Ministry of Defence Sea King |
| 2017- | Developing Assets (UK) Ltd Sea King |