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: Relative position
The relative position function allows you to
compare two GPS locations. By doing so you
can determine the distance between the two
locations, the direction from one to another
(relative to true North), the difference in alti-
tude and the difference in timestamps.
Note:
The GPS system by its nature often reports
large errors in the altitude parameter, if you
experience a large unexpected offset in ele-
vation this is not a defect in your GPS receiv-
er.
}Relative position menu
The relative position menu is available when
you have a Current Position, when you are
receiving locations in the Continuous Posi-
tion and when you receive a special GPS
SMS. In all of these cases, a relative position
can be calculated against a stored waypoint.
You may also calculate the relative position
between any two stored waypoints.
}Invert
When in the relative position display, the in-
vert function can be selected to swap the
compared points. This changes the direction
by 180° and inverts the sign on the elevation
and timestamp differences. When the invert
function is on, the first line of the informa-
tion display starts with *.
: Receiving a GPS way point
When your mobile phone receives a GPS
waypoint via SMS the display will prompt you
to save it in waypoint memory, compute rel-
ative position, send out as SMS message or
reject it. Received GPS waypoints are not
stored with your SMS messages; they are
saved in waypoint memory. If all 10 GPS
waypoint locations are full then saving a GPS
waypoint will overwrite the existing GPS
waypoint in the selected location.
Note:
Only specially coded GPS waypoints are rec-
ognized by your mobile phone software.
Example of saving a GPS waypoint being re-
ceived:
Press
Read
The GPS information will be dis-
played
Press Options
Select Save
Choose a waypoint location entry
Press
Save
You will be prompted to enter a waypoint
name
Press
Save
: Select format (8-5)
This feature allows you to change the format
in which the position information is dis-
played.
Select
Menu > GPS Manager > Select Format
The current setting is displayed.
Press Change
Scroll to the desired display format
Press
Select
GPS WPT Rcvd
Reject
from
Steve
Read
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