Filter
Top Products
Magellan GPS Tracker 81
NMEA National Marine Electronics Association. A profes-
sional organization that defines and maintains the
standard serial format used by marine electronic
navigation equipment and computer interfaces.
OSGB A coordinate system describing only Great Britain,
similar to UTMs. Used with GRB36 datum.
Position fix Position coordinates as computed by the GPS Tracker.
SOG Speed Over Ground. The speed at which the receiver
is moving.
TRN Turn. Degrees or direction to turn.
True North The direction to North Pole from an observer’s
position. The north direction on any geographical
meridian.
TTG Time To Go. The measurement of how long it will
take you to arrive at your destination. TTG is based
on how fast you are moving towards the destination
and the distance remaining.
UTC Universal Time Coordinated. Formerly referred to as
Greenwich Mean Time (GMT).
UTM Universal Transverse Mercator metric grid system
used on most large and intermediate scale land
topographic charts and maps.
VMG Velocity Made Good. The component of the velocity
that is in the direction of the destination.
Waypoint WPT. A location saved in the receiver’s memory
which is obtained by entering data, editing data,
calculating data or saving a current position. Used to
create routes.
XTE Cross Track Error. The perpendicular distance
between the present position and the courseline.
Given as a distance, right or left, of course when
facing the destination.