Map Datum Selection - Lowrance AirMap 1000 Operation Instructions Manual

To set range rings: Press
. With the option highlighted, press
R
INGS
uncheck it (turn off). After the option is set, press
page display.
To set Lat/Lon Grid: Press
L /L G L
AT ON RID
(turn on) and uncheck it (turn off). After the option is set, press
return to the page display.

Map Datum Selection

Maps and charts are based on a survey of the area that's covered by the
map or chart. These surveys are called "Datums." Maps that are cre-
ated using different datums will show the same latitude/longitude in
slightly different locations.
All datums are named. The GPS system is based on the WGS-84 da-
tum, which covers the entire world. Other datums may also cover the
entire world, or just a small portion of it. By default, your position
shows using the WGS-84 datum. However, it can show your position
using one of 191 different datums.
To change the datum:
1. Press
MENU
2. Scroll ↓ or ↑ to select the desired datum, then press
3. To return to the last page displayed, press
A list of the datums used by this unit is in the back of this manual.
GPS Setup Menu, left, Map Datum Menu, right.
. With the option highlighted, press
INES
| |↓ to
MENU GPS S
|↓ to
MENU M
AP
|↓ to
MENU
|
ENT
ETUP
89
. Press ↓ to
|
D ENT
ATA
to check it (turn on) and
ENT
EXIT
|
M D ENT
AP ATA
|↓ to
D S
ATUM ELECTION
ENT
| .
EXIT EXIT
R
ANGE
to return to the
. Press ↓ to
to check it
ENT
EXIT
| .
ENT
.
to