satmap ACTIVE 10 Full User Manual page 89

24.00 Glossary
Trail Up
The map is orientated to match the ground
ahead of you.
Trip Log
Records trip data.
True North
The direction along the earth's surface
towards the geographic North Pole.
UTC (also GMT and Zulu time)
The worldwide standard for time is
coordinated universal time, abbreviated
UTC. This was formerly known as Greenwich
Mean Time, GMT. UTC is a high precision
atomic time standard also referred to by the
military and civil aviation as Zulu time (Z).
The abbreviation is a compromise between
CUT (Coordinated Universal Time) and TUC
(Temps Universel Coordonné).
UTM
The Universal Transverse Mercator
coordinate system is a grid based method
of specifying locations.
VMG
Velocity Made Good is the effective velocity
towards a target, after the effects of
crosswinds (especially relevant to aircraft),
currents (watercraft) and terrain (walkers/
cyclists who have planned on walking at a
certain speed) have taken effect. It is the
forward component of velocity.
© Satmap Systems Ltd
WAAS
Wide Area Augmentation System. This is a
GPS augmentation system in the U.S. which
enhances the accuracy of GPS.
Warning Radius
Distance at which the unit will sound beeps
indicating the vicinity of a POI, GoTo point
or a route.
Waypoint
Set of coordinates that identify a point on the
map and make up a route ('route points').
Waypoints are usually placed at turns in the
path or where the path changes.
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