Installation and Operation Instructions CDF Fish-finding Sonars & Mapping FishStrike 2000, SeaChamp 2000

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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: From the Map Page, press

MENU|↓ to MAP

DATA|ENT. Press ↓ and → to RANGE RINGS. With the option highlighted,

press

ENT to check it (turn on) and uncheck it (turn off.) After the

option is set, press

EXIT|EXIT to return to the page display.

To set Lat/Long Grid: From the Map Page, press

MENU|↓ to MAP

DATA|ENT. Press ↓ and → to LAT/LON GRID LINES. With the option

highlighted, press

ENT to check it (turn on) and uncheck it (turn off.)

After the option is set, press

EXIT|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

different locations.

All datums have names. 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 unit uses the

WGS-84 datum. It, however, can show your position using any of 191

different datums. To change the datum:

1. Press

2. Scroll ↓ or ↑ to select the desired datum, then press ENT.

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.

GPS Setup Menu (left); Map Datum Menu (right).