Garmin GPSMAP 172 Owner's Manual

Also see for GPSMAP 172: Installation instructions Specifications Quick reference

Contents

Loran TD SetupThe LORAN Position Format field is located under the Units tab in the Main Menu. The ‘LORANTD Setup’ window contains the fields to select the Loran GRI-Chain Number, Primary and SecondaryStations, and TD Offsets.To setup Loran TD from the Main Menu:1. Using the ARROW KEYPAD, highlight the ‘Setup tab, then press RIGHT to highlight the ‘Units’submenu tab. Highlight the “Position Format” field and press ENTER. You may also press MENUfrom the “Units” tab to display the ‘Loran TD On’ option. (If you use ‘Loran TD On’, skip to step 3.)2. Highlight ‘Loran TD’, press ENTER, then highlight ‘Setup’ and press ENTER.3. To change the settings of any of the five fields, highlight the field, press ENTER, select/enter thedesired setting and press ENTER.4. When done, press the QUIT key to return to the Main Menu.If the active GRI Chain, secondary stations or offsets have been changed since the waypoint wascreated, the waypoint now references the active GRI-chain and secondary stations and adjust the TDcoordinates accordingly. Remember that the GPS is not relying on the LORAN signal for navigationand actually converts the TD coordinate to a useful LAT/LON coordinate (in the background) beforestoring the waypoint to memory or using it for navigation. Because of this the unit can navigate to a TDcoordinate anywhere in the world.For more information on Loran TDs, you may download Garmin’s “Loran TD Position FormatHandbook” from the Garmin web site.Loran TD Setup WindowAppendix A