2 GPSMAP 496 Owner’s ManualAppendix > MessagesLost Satellite reception—the unit is unable to receive satellitesignals.Marine Warning—a marine warning was issued by the NationalWeather Service.Memory Full—unit memory is full, no further data can be saved.Memory (raM) Failed Unit needs repair—there is an internalproblem with your unit. Contact Garmin Product Support to have theunit serviced.near proximity point—you have reached the distance set for aproximity waypoint.nMEa Depth is Below transducer—no keel offset value has beenreceived from the external sonar device.no Diff gpS Location—RTCM is selected but the unit is notreceiving DGPS data.no roads near Destination—the destination for the road route youtried to calculate is not near any roads. Select a different destination.no roads near Starting point—the start location for the roadroute you tried to calculate is not near any roads. Select a differentstart location.no DgpS position—no differential connection data is available, ornot enough data is available to calculate a DGPS position.no tide Stations for that area—no tide stations within 100 milesof the area.no XM Signal—the GXM 30A antenna is not receiving an XMsignal.none Found—no data matched the search criteria.off Course—you are off course by the distance set in the OffCourse Alarm.proximity Memory Full—no additional proximity waypoints canbe saved.proximity radius overlaps—the radius of two proximitywaypoints overlap.route already Exists—you have entered a route name that alreadyexists.route Calculation Error—no route can be calculated.route Memory Full—no additional routes can be saved.route truncated—uploaded route from another device has morethan 300 waypoints.route Waypoint Memory Full—no additional route waypoints can