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Position Page
The GPSCOM 170’s position page shows you where
you are, what direction you’re heading and how fast you
are going (up to 99.9 mph), and is most useful when you
are travelling without an active destination waypoint. A
graphic compass tape at the top of the page displays your
cardinal heading (while you’re moving), with your cur-
rent track and speed over the ground indicated below.
The rest of the page shows your present position in
three dimensions (latitude, longitude and altitude). The
units of measure for speed, distance, position and altitude
are all user-selectable through the navigation setup menu
(see page 59). The 12/24 hour clock and time offset
options are available from the system setup menu
(see page 57).
Trip Odometer
The position page also features a resettable trip
odometer to measure the total distance travelled
while navigating.
To reset the trip odometer:
1. Highlight the ‘TRIP’ field.
2. Press
E
followed by
the left arrow key
.
3. Press
E
to finish.
Altitude Display
When the GPSCOM 170 is acquiring satellites or
navigating in the 2D mode, the last known altitude will
be used to compute your position. If the altitude shown
is off by several hundred feet, you can manually enter
your altitude for greater accuracy. Note that GPS altitudes
can fluctuate due to errors.
To enter your altitude:
1. Highlight the ‘ALT’ field. Press
E
to begin entry of
your altitude.
2. Use the arrow keypad to enter a value in each charac-
ter field and to move to the next character position.
3. Press
E
to confirm the altitude.
Position Page
Reference
21
The speed displayed on the
position page may fluctuate
at slow speeds (or when
you’re standing still).
To reset the trip odometer,
highlight the trip field and
press ENTER. Use the
LEFT arrow key to clear the
distance field and press
ENTER to confirm.
170 manual pages rev D 9/21/98 9:23 AM Page 21