Chapter 3: Operation
3-39
While Track is on, it is recorded in memory as the Current Track and is
retained following a
POWER OFF/ON
. You specify the interval at which
track points are created and a line is drawn on-screen between each point.
The current track remains on-screen until you clear the track.
Breaks in the track will be caused when any of the following occur for
longer than the specified interval: the track is switched off then on; the
GPS fix is lost; the plotter is switched off.
Using the
SmartRoute
function, a track (or the last segment of a track
with breaks) can be converted to and saved as a route which is
automatically reversed, ready for use as your return voyage, see
SmartRoute
on
page 3-41
.
A total of 4500 track points can be saved, in up to five track files (each
containing a maximum of 750 points).
The Current Track can be saved, named and retrieved for display at a later
date. For example, you may wish to display a previous track and place
waypoints along it that you can follow. You can only display one track at
a time; you must clear a current track from the screen if you want to
display a saved track.
This section describes how to:
•
Set up a track and specify the Track Point interval.
•
Clear the Current Track.
•
Manage tracks using the Track List, including Saving, Naming, Eras-
ing and Showing a track.
•
Convert the current track to a route.
Setting Up a Track
The track soft keys are used to switch the Track on and to specify the
interval at which track points are placed. The time interval between track
points can be set to 1s, 5s, 10s, 30s, 1min, 3min, 5min, 10min or
30minutes. The distance spacing between track points can be set to
0.1nm, 0.5nm or 1.0nm. The maximum track length is 750 points per
track. When this limit is reached, track points continue to be placed, but
the oldest points start to be overwritten. Track points continue to be
placed until
TRACK OFF
is selected. When the unit is powered off, the
current track (thus far) is retained in memory.
Setting a short time interval between track points is best suited to
navigation within a close or complex environment, eg. an estuary or
marina whereas, in contrast, a greater distance interval is best suited to a
long haul voyage.
81171_4.BOOK Page 39 Thursday, November 29, 2001 11:34 AM
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