Garmin GPSMAP 392, 398, 492, 498 Owner's Manual

Also see for GPSMAP 392, 398, 492, 498: Quick reference guide Specifications

Contents

GPSMAP 392/398/492/498 Owner’s Manual 21BASIC OPERATION > ADDITIONAL INFORMATION AND DSCAdditional InformationEach item on the map has information about the point available.The information varies depending on the type of data loaded onthe optional data card. Sub tabs along the top of the detail windowcontain the information available for the item. Any additionaloptions are shown along the bottom.To view additional information for a Map item:1. On the Map Page, use the ROCKER to highlight a mapitem, and press ENTER.2. Use the ROCKER to highlight the individual tabs, and showthe information. To scroll the text, highlight the field, andpress ENTER. Use the ROCKER to scroll.Information WindowAdditionalinformation tabsAdditional optionsDistance, Bearing,and Coordinates ofitemDSC (Digital Selective Calling)The DSC tab controls and sets up the DSC features on theGPSMAP 392/398/492/498.DSC uses marine VHF radio and GPS technologies to transmitand receive location information. The chartplotter repeats the callproperties received from the VHF radio on the chartplotter. TheGPSMAP 392/398/492/498 requires input from a DSC-enabledVHF radio to show position, and sound/show alerts from a distresscall or position report. Conversely, the VHF radio requires inputfrom a GPS to transmit position coordinates for a distress call orposition report. For connection information, refer to “Connectingthe Power/Data Cable” on page 92.An emergency DSC distress call allows a vessel in troubleto transmit a substantial amount of information in a singletransmission or call, without the need for voice communication.When any nearby rescuer receives the DSC signal, an alarm soundsand they immediately receive the location of the caller. The rescuercan choose to navigate to the caller’s location to assist, or forwardthe call on to the Coast Guard. When the Coast Guard receives the