The satellite sky view shows a bird’s-eye view of the
position of each satellite relative to the unit’s last known
position. The outer circle represents the horizon (north up);
the inner circle 45º above the horizon; and the center point
directly overhead. You can use the sky view to help deter-
mine if any satellites are being blocked, and whether you
have a current position fix (indicated by a ‘2D NAV’ or ‘3D
NAV’ in the status field.
Once sufficient signals have been acquired, the status
page will be replaced with the position page, provided you
have not pressed any other buttons.
Position Page
The second page in the GPS 40’s main page sequence is
the position page. The position page shows where you are,
what direction you’re heading and how fast you’re going,
and is particularly helpful when you do not have an active
destination selected. The graphic display at the top of the
page indicates your cardinal heading (while you’re moving)
with the track and speed indicated below.
The graphic compass display is designed to show
your current track and does not serve as a true
magnetic compass while you’re standing still.
The rest of the page shows your current position in
three dimensions: latitude, longitude and altitude. The
GPS 40 uses this basic information to mark exact positions
as waypoints, which help guide you from one place to
another. A trip odometer and 12/24 hour clock are also
provided.
10
Getting Started
Sky View/
Position Page
Once satellites have been
found, hollow signal strength
bars will be displayed while
data is being collected. The
hollow bars can be used to
help determine if satellites
are being shaded.
Position Page
In addition to displaying
your position coord i n a t e s ,
the position page shows
your track and speed over
the ground. Speed and alti-
tude data may fluctuate due
to Selective Availability.
Status
Battery
Indicator
Satellite
Sky View
Horizontal
Accuracy
Signal Strength
Indicators
Satellite
Number
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GPS 40 XL 8/5/98 8:16 AM Page 10
