The IAMSAR Manual is published jointly by the International Civil Aviation Organization and the International Maritime Organization.
International Aeronautical and Maritime Search and Rescue Manual
IAMSAR VOLUME 1: Organization and Management
Volume I, Organization and Management, discusses the global SAR system concept, establishment and improvement of national and regional SAR systems and co-operation with neighbouring States to provide effective and economical SAR services.
IAMSAR VOLUME 2 : Mission Co-ordination
Assists personnel who plan and co-ordinate SAR operations and exercises
IAMSAR VOLUME 3 : Mobile Facilities
Volume III, Mobile Facilities, is intended to be carried aboard rescue units, aircraft and vessels to help with performance of a search, rescue or on-scene co-ordinator function, and with aspects of SAR that pertain to their own emergencies
Good high level intro of IAMSAR manuals