 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. 
