Magellan GPS Tracker User Manual

Page 97

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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.

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