High Quality Content by WIKIPEDIA articles! 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 sea-going 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.