In 1955, the RCN purchased Sikorsky H04S helicopters and equipped them with dunking sonars.
2.
The Mihir is a dunking sonar meant for use by the Naval ALH, working in conjunction with its Tadpole sonobuoy.
3.
These included sonobuoys, first developed by the British in 1944 under the codename " High Tea ", dipping / dunking sonar and mine detection sonar.
4.
Other payload or mission systems are installed either permanently or temporarily, based on specific mission requirements; optical and IR cameras for scout helicopters, dunking sonar and search radar for anti-submarine helicopters, extra radio transceivers and computers for helicopters used as airborne command posts.
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