Garmin 182/182C Owner's Manual

Also see for GPSMAP 182C: Declaration of conformity Declaration of conformity Owner's manual Specifications

Contents

Garmin 182/182C Owner's Manual Manual pdf 114 page image

108 GPSMAP 182/182C Owner’s ManualAPPENDIX > 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 transition fromusing LORAN to using GPS. The GPSMAP unit automaticallyconverts GPS coordinates to LORAN TDs for those who have acollection of LORAN fixes for favorite fishing spots and otherwaypoints recorded as TDs. You can display your position as a TDor enter waypoints as TDs. The accuracy to be expected from thisconversion is approximately 30 meters. When the unit is placedin the LORAN TD format mode, it simulates the operation of aLORAN receiver. Position coordinates can be displayed as TDs,and all 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 182/182C 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.