Glossary 75
Glossary
This glossary explains the terms and abbreviations that may be
unfamiliar to the reader.
G.1 Terms
Bearing The direction of an object from the observer. Can be
stated as an angle relative to either true or magnetic
North.
Chapter A group of related pages and sub-pages.
Course The direction in which the vessel is to be steered or is
being steered. The direction of travel through the
water.
Master A unit with transducers connected.
Page A standard set of data values and their associated
text descriptions and graphic indicators, that are
displayed on the screen at one time.
Repeater An instrument that displays data it has received,
without modification.
SeaTalkThe Raymarine standard for data communications.
Sub-page A secondary page within a chapter, that is accessed
using the DOWN or UP key, rather than one of the
main 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 with
Lat/Long or TD as the coordinates.
G.2 Abbreviations
BTW Bearing To Waypoint.
COG Course Over Ground. The actual direction of your vessel’s
calculated movement over the ground.
DTW Distance To Waypoint.
ETA Estimated Time of Arrival.
MOB Man OverBoard.
NMEA National Marine Electronics Association (interconnection
standard).
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