Main Deck - The main continuous deck of a ship running from fore to aft; the principle deck; the deck from which the freeboard is determined; usually the deck immediately below the shelter or weather deck.
Category: - Maritime

MAJAID - Major Air Disaster: An aircraft incident occurring in Canada which, because of the number of people involved, requires augmentation of established search and rescue resources. This is any plane crash involving more than six people is referred to as a Major Air Disaster. In the event of a MAJAID, every available SAR Tech is loaded onto the first airplane and flown to the crash site. Once the SAR Techs parachute to the ground, the senior SAR Tech takes over responsibility for the scene; others set up triage and treatment facilities."catastrophe aéronautique"
Category: - Maritime - Acronym

Major Air Disaster - An aircraft incident occurring in Canada which, because of the number of people involved, requires augmentation of established search and rescue resources. This is any plane crash involving more than six people is referred to as a Major Air Disaster. In the event of a MAJAID, every available SAR Tech is loaded onto the first airplane and flown to the crash site. Once the SAR Techs parachute to the ground, the senior SAR Tech takes over responsibility for the scene; others set up triage and treatment facilities."catastrophe aéronautique"
Category: - Risk - SAR

Major Search And Rescue Operations - (a) Aeronautical and maritime search and rescue incidents where primary maritime and/or primary aeronautical search and rescue units are tasked on an incident for more than four calendar days; (b) incidents which the search and rescue region commander assesses as being potentially sensitive; or (c) special cases, as directed by the National Defence Headquarters. "opérations majeures de recherche et sauvetage"
Category: - Risk - SAR

Manhole - A hole cut in a bulkhead, tank top, etc., to allow the passage of a man.
Category: - Maritime

Manifest - A document containing a full list of the ship's cargo, extracted from the bills of lading.
Category: - Maritime

Manning Scales - The minimum number of officers and crew members that can be engaged on a ship to be considered as sufficient hands with practical ability to meet every possible eventuality at sea.
Category: - Maritime

MANOT - Missing Aircraft Notice
Category: - Acronym - SAR

Map - A depiction of all or part of the earth or other geographic phenomenon as a set of symbols and at a scale whose representative fraction is less than 1:1. A digital map has had the symbols geocoded and stored as a data structure within the map database.
Category: - GIS

Map projection - A mathematical model for converting locations on the earth's surface from spherical to planar coordinates, allowing flat maps to depict three dimensional features. Some map projections preserve the integrity of shape; others preserve accuracy of area, distance, or direction.
Category: - GIS