 The first anti-submarine version for the Royal Navy, with Gnome H.1400 engines, a five-bladed tail rotor, a Plessey Type 195 dipping sonar and MEL ARI 5995 search radar in a dorsal radome. The Westland Sea King HAS.1 first flew on 7 May 1969. 56 built, many of which were converted to HAS.2.
