Garmin GPS 90, Руководство пользователя и справочник

Страница: 44 / 92

The GPS 90 Position page displays your current posi-
tion’s latitude, longitude, altitude and time numerically. It
also displays your track (compass direction) and speed
whenever you’re moving.
The Position page also lets you enter a position’s lati-
tude and longitude manually. During satellite acquisition,
the position displayed is the last computed position
s t o red in memory. If the re c e i v e r ’s position has moved
several hundred miles with the power off or memory has
been lost due to battery failure, the unit may take 7 1/2 to
15 minutes to acquire satellite data.
To speed up the acquisition process, you can enter a
m o re accurate initial position or re f e rence airport (see
page 44. Be sure to accurately enter the latitude and lon-
gitude to the nearest degree. An incorrect lat/lon may pre-
vent the receiver from tracking the correct set of satellites
for your position.
To manually enter a position:
1. Press the
D
key until the position field is highlighted.
2. Press
E
to begin entry of your position.
3 Use the arrow keypad to enter the new position.
4. Press the
E
key to confirm your changes.
When the GPS 90 is acquiring satellites or navigating
in the 2D mode, the last known altitude will be used to
compute your position. You may also manually enter an
altitude. Keep in mind that GPS altitudes may vary signif-
icantly from pre s s u re altimeters. Never use GPS altitude
for vertical navigation.
To enter an altitude manually:
1. Press the
D
key until the altitude field is highlighted.
2. Press
E
to begin entry of your altitude.
3. Use the arrow keypad to enter the altitude.
4. Press the
E
key to confirm the altitude.
36
Position Page
Entering
Position
& Altitude
Entering an altitude
manually.
Entering a position
manually.
gps 90 manual 8/6/98 9:59 AM Page 36