International Aeronautical and Maritime Search and Rescue Manual
The International Aeronautical and Maritime Search and Rescue (IAMSAR) Manual is a manual for organization and operation of maritime and aviation search and rescue. The IAMSAR Handbook is jointly published by two UN agencies: International Civil Aviation Organization (ICAO) International Maritime Organization (IMO) It contains guidelines for Search and Rescue in terms of shipping and aviation.
Source: Wikipedia — International Aeronautical and Maritime Search and Rescue Manual (CC BY-SA 4.0)