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GPS Training - Garmin Etrex
2. MAP SCREEN
While the Garmin Etrex GPS cannot display
maps of terrain or roads it does has a useful
map screen which shows the position of
waypoints and tracks you have made or
saved. The scale of the map is shown at the
bottom left; this can be changed using the
UP/DOWN buttons.
There are 2 different modes for this screen -
North Up or Head Up.
In North Up mode your position is shown as
an arrow head which points in the direction
you are going. This screen is most useful
when you are making a new track. North is
towards the top of the screen (whether this
is True or Magnetic depends on how you've
set it up - details of this are given later).
In Head Up mode your position is shown as
a little man who walks as you move. Your
position is where his head is and the map
always shows what's ahead. of you; An
arrow shows where North is.. This screen is
Map Screen - North Up
Tristan Darwin Project
most useful when you are retracing your
steps, following a recorded track or aim-
ing for a waypoint.
If there aren't enough satellites in view
and the unit isn't 'ready to navigate' your
postion marker is replaced by a flashing
question mark.
Waypoints in range are displayed on the
screen with their name. As you move
along, the position marker leaves a trail
behind it on the screen (a bit like a snail
leaving a silvery trail) and this can be
very useful for retracing your steps or fol-
lowing a route or track you've recorded
before.
NOTE - This GPS unit can only tell which
way is North when it is moving, once you
stop it can't determine which direction
you're facing. More sophisticated units
have a built-in compass which works
even when stationary.
Map Screen - Head Up
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