Satmap active12 Guia do Utilizador descarregar pdf (Página 99)

© Satmap Systems Ltd

© Satmap Systems Ltd 2014

99

22. Glossary (... cont)

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.

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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