Ramp (Or Strip) Alert - An increased standby posture maintained by Canadian Forces search and rescue forces during periods of increased or notable activity. "alerte « aire de trafic » ou « piste d’envol »"
Category: - SAR

Random - Having no discernible structure or repetition.
Category: - GIS

Range - The highest value of an attribute less the lowest, in the unit of the attribute.
Category: - GIS

Range Lights - A set of two small lighthouses, aligned so that if a vessel lines them up, they will be guided safely into a harbour, through narrow channels.
Category: - Maritime

Raster - A data structure for maps based on grid cells.
Category: - GIS

Ratio - A level of measurement at which numerical information is available about a feature based on an absolute origin. For land parcels, for example, the assessed value in dollars would be an example, the value zero having real meaning.
Category: - GIS

RCC - Rescue Co-ordination Centre: A unit responsible for promoting efficient organization of search and rescue (SAR) services and for co-ordinating the conduct of SAR operations within an associated Search and Rescue Region. "centre de coordination de sauvetage"
Category: - Acronym - SAR

Record - A set of values for all attributes in a database. Equivalent to a row of a data table.
Category: - GIS

Reefer - Refrigerator ship; a vessel designed to carry goods requiring refrigeration, such as meat and fruit. A reefer ship has insulated holds into which cold air is passed at the temperature appropriate to the goods being carried.
Category: - Maritime

Reefer Box - An insulated shipping container designed to carry cargoes requiring temperature control. It is fitted with a refrigeration unit which is connected to the carrying ship's electrical power supply.
Category: - Maritime

Reeve - To pass the end of a rope through a pulley, etc.
Category: - Maritime

Registry - The country in which the ship is registered (the official nationality of the ship)
Category: - Maritime

Regression - The relationship between the mean value of a random variable and the corresponding values of one or more independent variables
Category: - Risk

Relative Humidity - The ratio of water vapour in the air at a given temperature to the maximum amount which could exist at that temperature. It is usually expressed as a percentage.
Category: - Weather

Relative Location - A position described solely with reference to another location.
Category: - GIS

Remotely Sensed Data - Data collected by a sensor that is not in direct contact with the area being mapped. Active remote sensing involves transmitting a beam that is detected after reflection; passive remote sensing simply measure light from the sun being reflected by objects being sensed. Similar instruments for remote sensing can operate from aircraft of satellites.
Category: - GIS

Renderers - A means to graphically depict characteristics in a spatial dataset
Category: - GIS

Representative Fraction - The ratio of a distance as represented on a map to the equivalent distance measured on the ground. Typical representative fractions are 1:1,000,000, 1:100,000, and 1:50000
Category: - GIS

Rescue Co-Ordination - The function of integrating the efforts of search and rescue (SAR) facilities and resources to achieve concerted and harmonized resolution of SAR incidents in an effective and efficient manner. "coordination des opérations de sauvetage"
Category: - SAR

Rescue Co-ordination Centre - (RCC) A unit responsible for promoting efficient organization of search and rescue (SAR) services and for co-ordinating the conduct of SAR operations within an associated Search and Rescue Region. "centre de coordination de sauvetage"
Category: - SAR