1.3 The tenus listed below are used in the annex with the following meanings:

.1 Search. An operation, normally co-ordinated by a rescue coordination centre or rescue sub-centre, using available personnel and facilities to locate persons in distress;

.2 Rescue. An operation to retrieve persons in distress, provide for their initial medical or other needs, and deliver them to a place of safety;

.3 Search and rescue service. The performance of distress monitoring, communication, co-ordination and search and rescue functions, including provision of medical advice, initial medical assistance, or medical evacuation, through the use of public and private resources including co-operating aircraft, vessels and other craft and installations;

.4 Search and rescue region. An area of defined dimensions associated with a rescue co-ordination centre within which search and rescue services are provided;

.5 Rescue co-ordination centre. A unit responsible for promoting efficient organization of search and rescue services and for coordinating the conduct ofsearch and rescue operations within a search and rescue region;

.6 Rescue sub-centre. A unit subordinate to a rescue co-ordination centre established to complement the latter according to particular provisions of the responsible authorities;

.7 Search and rescue facility. Any mobile resource, including designated search and rescue units, used to conduct search and rescue operations;

.8 Search and rescue unit. A unit composed of trained personnel and provided with equipment suitable for the expeditious conduct of search and rescue operations;

.9 Alerting post. Any facility intended to serve as an intermediary between a person reporting an emergency and a rescue coordination centre or rescue sub-centre;

.10 Emergency phase. A generic term meaning, as the case may be, uncertainty phase, alert phase or distress phase;

.11 Uncertainty phase. A situation wherein uncertainty exists as to the safety of a person, a vessel or other craft;

.12 Alert phase. A situation wherein apprehension exists as to the safety of a person, a vessel or other craft:

.13 Distress phase. A situation wherein there is a reasonable certainty that a person, a vessel or other craft is threatened by grave and imminent danger and requires immediate assistance;

.14 On-scene co-ordinator. A person designated to co-ordinate search and rescue operations within a specified area;

SAR Convention (1979) : http://www.imo.org/en/KnowledgeCentre/IndexofIMOResolutions/Maritime-Safety-Committee-(MSC)/Documents/MSC.70(69).pdf