on the map. It then shows the present position as distance on the map from that reference point.

For example, if it shows a distance of UP 4.00" and LEFT 0.50", you then measure up four inches and to the left a half-inch from the refer- ence point on the map to find your location.

To configure a map fix:

To use this format, you need to follow these steps in order. Take a map of the area and determine a reference latitude/longitude.

NOTE:

In order for this system to work, the latitude/longitude lines must be parallel with the edge of the map. USGS maps are parallel, oth- ers may not be. Also, this works better with smaller scale maps, such as 1:24000.

The reference position can be anywhere on the map, but the closer it is to your location, the smaller the numbers you will be working with.

Once you have decided on a reference position, you can save it as a way- point. See the waypoint section for information on saving a waypoint. Save the reference position as a waypoint. Exit the waypoint screens.

1.Press MENUMENUto GPS SETUPENT.

2.Press to COORDINATE SYSTEMENT.

3.Press to SETUP MAP FIXENT.

The screen below appears, and MAP SCALE is highlighted. Press ENT and enter the map's scale. This is generally at the bottom of the paper map. It's shown as a ratio, like 1:24000. Press EXIT and the unit returns to the Configure Map Fix screen.

Configure a map fix so the unit can find your position on a printed chart or topographical map.

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Eagle Electronics 642c iGPS manual To configure a map fix