Magellan MAP 330M Frequently Asked Questions Manual page 7

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The Map 330 database contains cities, highways, airports,
waterways, and national parks.
Can I delete preloaded waypoints that I don't use?
No. Waypoints that are preloaded into the MAP 330 will always be
available, even when all of the MAP 330's memory has been
cleared.
Why does my compass not point in the right direction?
For that you should be moving at a minimum of 2.0 mph for the
compass to compute the direction properly.
What is a backtrack route?
A backtrack route allows you to "retrace" your steps. As you are
moving, the MAP 330 automatically creates and stores hidden
waypoints into memory. These waypoints are the ones that the MAP
330 will use to retrace your steps. When you create a backtrack
route, the MAP 330 converts these hidden waypoints into user
waypoints
How do I know which route is active?
Access the route menu by pressing the menu button and select the
option routes. The route menu lists all of the routes in memory with
the active route displayed in bold characters.
Why does my MAP 330 and 330M not make an audible beep when I
have an alarm active?
Check your setup settings for the Beeper. If the selection is off or
keys only, the beeper will not sound for alarms.
What can I do if the receiver will not turn on?
1. Check to see if the batteries are installed correctly.
2. Replace with two new AA alkaline batteries.
My GPS takes more than 10 minutes to get the position. What can I
do?
If there are any obstacles nearby or overhead, move to a new
location. Make sure that the antenna is pointing up, has a clear view
of the sky and is a reasonable distance away from your body.
Check satellite status screen to see where the satellites are and if
the receiver is acquiring data. If the receiver still does not get a
position fix within 10 minutes, you may wish to repeat the
initialization procedure.
Why does my GPS Receiver turn off unexpectedly?