Garmin GPSMAP 292 Owner's Manual

Also see for GPSMAP 292 - Marine GPS Receiver: Install guide Quick reference guide Declaration of conformity

Contents

Garmin GPSMAP 292 Owner's Manual Manual pdf 109 page image

GPSMAP 292/298 Owner’s Manual 103APPENDIX > L ORAN TD SYSTEMLORAN TD SystemLORAN C is a radio navigation aid operated and maintained in theUnited States by the United States Coast Guard. The name LORANis an acronym for “LOng RAnge Navigation.” The LORAN systemcovers the entire United States and the U.S. Coastal ConfluenceZone. From the perspective of a mariner, the system is used forocean and coastal navigation. It can be used as a supplementalsystem for harbor and harbor approach navigation, and it is usedfor inland navigation by recreational vehicles.Change to Loran TD from the Unitstab on the Main Menu.LORAN TD FeatureThe LORAN TD (Time Delay) feature eases the transitionfrom using LORAN to using GPS. The GPSMAP 292/298 unitautomatically converts GPS coordinates to LORAN TDs for thosewho have a collection of LORAN fixes for favorite fishing spotsand other waypoints recorded as TDs. You can show your positionas a TD or enter waypoints as TDs. The accuracy to be expectedfrom this conversion is approximately 30 meters. When the unit isplaced in the LORAN TD format mode, it simulates the operationof a LORAN receiver. Position coordinates can show as TDs, andall navigation functions can be used as if the unit was actuallyreceiving LORAN signals.Using the LORAN TD FormatWhen creating new waypoints using LORAN TD coordinates,you must set the correct LORAN chain number and secondarystations in the Setup TD field before storing the waypoint. Afterthe waypoint is stored in unit memory, it always references theLORAN chain number and secondary stations currently selected inthe Setup TD field. If you enter a different LORAN chain numberor change the secondary stations or offsets in the Setup TD field,the active waypoint information reflects those changes. Becausethe GPSMAP 292/298 does not rely on the LORAN signal fornavigation, it can reference a different GRI chain and/or secondarystations and still navigate to the location stored in memory.