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64 | Keypad & Display Description

Position

There are three POS screens in the CDU. The POS functions are highly interactive with a

number of CFG1 menu selections.

The following CFG1 menus directly impact the POS functions:

COG SOG - sets the filtering time for the displayed values.

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Datum - sets the reference datum for your present position.

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DGPS - sets the internal or external control for RTCM SC-104 corrections which affect

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your position accuracy.

GPS - sets an offset for calculating the GPS antenna position if you can’t physically

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locate the antenna exactly where you want it (i.e. over the centerline of the boat);

sets the minimum elevation angle to look for satellites; and in 6 channel models, it

also controls the satellite selection process.

Navigation - sets a variety of important functions and alarms (used in other function

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screens), but only the Range units:

nautical miles (Nm)

nautical miles and meters (Nm/mtrs)

nautical miles and feet (Nm/ft)

statute miles (Sm)

statute miles and meters (Sm/mtrs)

statute miles and feet (Sm/ft)

kilometers (Km), or

kilometers and meters (Km/mtrs), affect the POS screens.

Position - sets Lat/Lon or UTM, Grid (optional) and some alarm limits.

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Time - sets appropriate offsets, and 12 or 24 hour clock mode.

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POS1 - Position Display (Large Lat/Long Digits)

This display provides the largest presentation of the Lat/Long coordinates from the CDU.

In addition to the coordinates and datum in use, it also displays the current course (COG)

and speed (SOG) over ground. There are no edit functions available in this screen unless it

is in Demonstration mode. Refer to Appendix E - Demonstration Mode for a full description

of this feature.

Latitude & Longitude

UTM

When using the UTM reference system in the polar regions of the Earth, the CDU displays

position using the UPS coordinate system instead of invalid UTM coordinates.

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Memorex RX 1 Smart Installationshandbuch Seite 66