Garmin GPS 150 - Manual (Page 17)

Section 1
Navigating with the GPS 150
Prior to using your GPS 150 for the first time in flight, we recommend that you taxi
to a location that is well away from buildings and other aircraft. The first time you use
the GPS 150 it will automatically collect satellite data, and should not be interrupted.
1. Turn on your GPS 150 by rotating
B
clockwise.
2. Press
E
to acknowledge database dates and cycle.
This will display the Receiver Status page, which, for the first use of your GPS
150, will be ‘Searching the Sky’. This means the unit is acquiring data to establish
almanac and satellite orbit information, which can take 7 1/2 to 30 minutes. A mes-
sage will inform you that the unit is ‘Searching the sky’.
When the GPS 150 has located at least one satellite, and is beginning to collect
information on all satellites, a ‘Collecting data’ message will be displayed. This is a
good indication that you are receiving satellite signals, and that satellite lock and
position fix will occur.
Following the first use of your GPS 150, the amount of time required for a posi-
tion fix will vary, usually from 2 to 5 minutes. If the GPS 150 has not been operated
for a period of six months, or it has moved over 300 miles without being on, it may
be required to Search the Sky to collect new data. This will be done automatically.
If only enough satellites can be acquired for 2D navigation (no altitude), the unit
will use the altitude provided by your altitude serializer, if installed. If not, you will
be prompted to enter the altitude with a ‘Need alt - press NAV’ message. If this mes-
sage occurs, press
N and use K and O to enter the altitude shown on your
altimeter. Press E when you are finished.
7
Section
1
REFERENCE
Power Up & Satellite
Acquisition
Database page
Welcome page
Receiver Status page
150man rev E 7/24/98 3:10 PM Page 7