SAR on Scene Coordinator (IAMSAR Vol. III) Edition 2014, T315E (Model Course 3.15) This model course aims to provide knowledge to those who may be designated to perform the duties and responsibilities of a Search and Rescue On-Scene Coordinator (OSC) for a search and rescue incident, as defined in the International Aeronautical and Maritime Search and Rescue Manual (IAMSAR), Volume III. By doing so, the purpose of this model course is to assist States in meeting their own SAR obligations they accepted under the International Convention on Maritime Search and Rescue, 1979 and the International Conventionfor the Safety of Life at Sea (SOLAS), 1974.