Map Datum Selection - Lowrance LCX-112C Operation Instructions Manual

The distance from your current position to the smaller ring (the ring's
radius) is 25 miles. With the arrow keys and map cursor, you can scroll
the map to see the third and fourth rings. In this example, the distance
to the third ring is 75 miles and distance to the fourth ring is 100 miles
from your current position.
To set range rings: Press ↓ to
highlighted, press
After the option is set, press
To set Lat/Long Grid: Press
highlighted, press
the option is set, press

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 "Datum."
Maps that are created using different data will show the same latitude/longitude
in slightly different locations.
All data are named. The GPS system is based on the WGS-84 datum,
which covers the entire world. Other data may also cover the entire world,
or just a small portion of it. By default, your unit uses the WGS-84 datum.
To change the datum:
1. Press
MENU
2. Scroll or
↓ ↑
To return to the last page displayed, press
3.
A list of the data used by this unit is in the back of this manual.
GPS Setup Menu (left); Map Datum Menu (right).
to check it (turn on) or uncheck it (turn off).
ENT
to check it (turn on) or uncheck it (turn off). After
ENT
|
EXIT
| | to
↓
MENU GPS S
to select the desired datum, then press
R
ANGE
| to return to the page display.
EXIT EXIT
to
↓
L /L
AT
to return to the page display.
EXIT
|
ENT
ETUP
152
. With the option
R
INGS
. With the option
G L
ON RID INES
| to
↓
D S
ATUM ELECTION
ENT.
|
EXIT EXIT.
|
ENT.