Air-sea rescue (ASR or A/SR, also known as
sea-air rescue ) is the coordinated
search and rescue (SAR) of the survivors of emergency
water landings as well as people who have survived the loss of their seagoing vessel. ASR can involve a wide variety of resources including
seaplanes,
helicopters,
submarines, rescue boats and ships. Specialized equipment and techniques have been developed. Military and civilian units can perform air-sea rescue.