6 GPSMAP 496 Owner’s ManualAppendix > Data Field Optionsttl avg Spd—see trip avg. Speed (total).turn—the distance between Bearing (BRG) and Track (TRG). Lindicates you should turn left. R indicates you should turn right. Thedegrees indicates the difference angle and the number of degreesyou should turn.User timer—the timer you set in the Main Menu.Velocity Made good—the rate of closure on a destination based onyour current speed and course of travel. Shown as VMg.Vertical Speed—the rate of climb or descent.Voltage—the direct current voltage level of an external powersource.Water Speed (Marine Only)—the data acquired from measurementdevices interfaced to the unit is used to calculate your current speedover water.Water temperature (Marine Only)—the temperature of water at ameasured depth using measurement devices interfaced to the unit.Waypoint (Destination)—the last point on a route, your destination.Appears as Dest Wpt.Waypoint (next)—the next waypoint in your route. Shown as nextWpt.Weather–altimeter—the altimeter setting at the nearest METARreporting station.Weather–Dew point—the dew point at the nearest weatherreporting station.Weather–pressure—the surface pressure at the nearest weatherreporting station.Weather–relative Humidity—the relative humidity at the nearestweather reporting station.Weather–temperature—the temperature at the nearest weatherreporting station.Weather–Wind—the wind speed and direction at the nearestweather reporting station.XM audio—the artist and song title of the XM audio channelcurrently playing.XM Signal—the strength of the XM signal.
