63
The distance from your current position to the smaller ring (the ring's
radius) is 25 miles (always 1/4 the zoom range). 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
MENU
|
↓
to
M
AP
D
ATA
|
ENT
. Press
↓
to
R
ANGE
R
INGS
. With the option highlighted, press
ENT
to check it (turn on) and
uncheck it (turn off.) After the option is set, press
EXIT
to return to the
page display.
To set Lat/Lon Grid:
Press
MENU
|
↓
to
M
AP
D
ATA
|
ENT
. Press
↓
to
L
AT
/L
ON
G
RID
. With the option highlighted, press
ENT
to check it (turn
on) and uncheck it (turn off.) After the option is set, press
EXIT
to re-
turn 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
|
MENU
|
↓
to
GPS S
ETUP
|
ENT
|
↓
to
D
ATUM
S
ELECTION
|
ENT
.
2. Scroll
↓
or
↑
to select the desired datum, then press
ENT
.
3. To return to the last page displayed, press
EXIT
|
EXIT
.
A list of the datums used by this unit is in the back of this manual.
offered by www.Busse-Yachtshop.de email: [email protected] Tel: +49 (0)4347 908234
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