Brunton Atlas MNS Spezifikationen PDF herunterladen (Seite 83)

After the option is set, press

EXIT to return to the page display.

Draw Boundaries

Press

MENU|↓ to MAP DATA|ENT. Press ↓ to DRAW BOUNDARIES. With the op-

tion 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.

Fill Land With Gray

Press

MENU|↓ to MAP DATA|ENT. Press ↓ to FILL LAND WITH GRAY. 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.

Map Overlays (Range Rings; Lat/Long Grid)

The map screen can be customized with four range rings and/or grids that

divide the plotter into equal segments of latitude and longitude.

Range rings are handy for visually estimating distances on the map. The

ring diameters are based on the current zoom range. For example: at the

100 mile zoom, the screen will show two rings with your current position in

the center. The large ring touching the left and right sides of the screen is

100 miles in diameter (same as the zoom range). The second smaller ring

is 50 miles in diameter (always 1/2 the zoom range).

The distance from your current position to the smaller ring (the ring's ra-

dius) 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 MAP DATA|ENT. Press ↓ to RANGE

RINGS. With the option highlighted, press ENT to check it (turn on) and un-

check it (turn off.) After the option is set, press

EXIT to return to the page

display.

To set Lat/Lon Grid: Press

MENU|↓ to MAP DATA|ENT. Press ↓ to LAT/LON

GRID. With the option highlighted, press ENT to check it (turn on) and un-

check it (turn off.) After the option is set, press EXIT to 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 created

using different datums will show the same latitude/longitude in slightly dif-

ferent locations.

All datums are named. The GPS system is based on the WGS-84 datum,

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 dif-

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