Glossary 75GlossaryThis glossary explains the terms and abbreviations that may beunfamiliar to the reader.G.1 TermsBearing The direction of an object from the observer. Can bestated as an angle relative to either true or magneticNorth.Chapter A group of related pages and sub-pages.Course The direction in which the vessel is to be steered or isbeing steered. The direction of travel through thewater.Master A unit with transducers connected.Page A standard set of data values and their associatedtext descriptions and graphic indicators, that aredisplayed on the screen at one time.Repeater An instrument that displays data it has received,without modification.SeaTalk The Raymarine standard for data communications.Sub-page A secondary page within a chapter, that is accessedusing the DOWN or UP key, rather than one of themain keys (NAV, DEPTH or SPEED).Variation The difference in degrees between “True North” and“Magnetic North”.Waypoint Any location that has been stored in memory withLat/Long or TD as the coordinates.G.2 AbbreviationsBTW Bearing To Waypoint.COG Course Over Ground. The actual direction of your vessel’scalculated movement over the ground.DTW Distance To Waypoint.ETA Estimated Time of Arrival.MOB Man OverBoard.NMEA National Marine Electronics Association (interconnectionstandard).
