Garmin GPS 152H Owner's Manual - Page 19

• Heading-selects the reference used in calculating heading information. ◦ Auto Mag Var-automatically sets the magnetic declination for your location. ◦ True-sets true north as the heading reference. ◦ Grid-sets grid north as the heading reference (000º). ◦ User Mag Var-allows you to set the magnetic variation value. • Dst, Spd, & Alt-defines the units of measure for distance, speed, and altitude in nautical, statute, or metric formats. • Dpth-defines the units of measure for depth. • Temp-defines the units of measure for temperature. Using the Communications Tab The Communications tab allows you to set the input/output format used when connecting your unit to other devices, such as NMEA 0183 devices, a PC, or another GPS 152H. Settings From any Main page, press Menu twice and highlight Com. • Garmin Data Transfer-supports the input or output of Garmin-proprietary data for communicating with Garmin software such as MapSource®. There are eleven Transfer Modes to choose from: Host, Request Almanac, Request Proximity, Request Routes, Request Tracks, Request Waypoints, Send Almanac, Send Proximity, Send Routes, Send Tracks, and Send Waypoints. • Other DGPS (differential GPS)-(input only) provides interfacing capabilities for 3rd party DGPS receivers. • RTCM In/NMEA Out-allows DGPS input using a standard RTCM format, and also provides NMEA 0183 version 2.3 output. • NMEA In/NMEA Out-supports the input and output of standard NMEA 0183 data, and provides sonar NMEA input support for the DPT, MTW, and VHW sentences (when connected to a sonar transducer). • None-provides no interfacing capabilities. • Garmin DGPS-used to connect the GPS 152H with a Garmin DGPS beacon receiver. When Garmin DGPS is selected, additional fields are provided to control a differential beacon receiver directly from your GPS 152H. You can set the unit to automatically scan for the DGPS beacon signal or you can enter the beacon frequency and bit rate. GPS 152H Owner's Manual 15