Managing Your TracksThe GPSMAP 378/478 draws an electronic breadcrumb trail ortrack log on the Map Page as you travel. The track log containspoints along its path, including time, and location for each point.The track log starts recording as soon as the GPSMAP 378/478 getsa location fix. For the best results, clear the track log before youstart traveling because when the track log is full, new track pointsoverwrite the oldest track points.The percentage of memory used by the current track log appears atthe top of the Active tab. After the track log is cleared, it shows zeropercent. When the track log reaches 100%, the most recent trackpoints start to overwrite the least recent track points (if Wrap isselected for Record Mode). To avoid losing track points, save thetrack log when it approaches the 99% mark.Setting Up and Saving Your TracksYou must first save the track log before you can use the NavigateTrack feature. The Save feature allows you to store up to 15 tracklogs from certain times and dates.To access the Track tab:1. Press Menu twice to open the Main Menu.2. Use the ROCKER to highlight the Track tab.Active Track TabRecord Mode—Wrap records over the oldest tracks when the tracklog reaches 100%. Fill records a track log until the track log is full(100%). When Off is selected, the unit does not record tracks.Interval—Distance records track points after a specified distancehas been traveled. Time creates track points after a specified timehas elapsed. Resolution records track points based on the resolution.The higher the resolution entered, the more points the unit creates tomake the track.Value—records a track according to the Interval and Value. Enter aspecific distance, time, or resolution.Color—select a color for the track when it appears on the map.36 GPSMAP 378/478 Owner’s ManualBASIC OPERATION IN MARINE MODE > M ANAGING YOUR TRACKS
