Garmin GPSMAP 396 Pilot's Manual page 180

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PPENDIX ESSAGES
Memory Full—unit memory is full, no further data can be saved.
Memory (RAM) Failed Unit Needs Repair—there is an internal problem
with your unit. Contact Garmin Product Support to have the unit serviced.
Memory (ROM) Failed Unit Needs Repair—there is an internal problem
with your unit. Contact Garmin Product Support to have the unit serviced.
Near Proximity Point—you have reached the distance set for a proximity
waypoint.
NMEA Depth is Below Transducer—no keel offset value has been received
from the external sonar device.
No Diff GPS Location—RTCM is selected but the unit is not receiving DGPS
data.
No Roads Near Destination—the destination for the road route you tried to
calculate is not near any roads. Select a different destination.
No Roads Near Starting Point—the start location for the road route you tried
to calculate is not near any roads. Select a different start location.
No DGPS Position—no differential connection data is available, or not enough
data is available to calculate a DGPS position.
No Tide Stations for that Area—no tide stations within 100 miles of the area.
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No XM Signal—the GXM 30 antenna is not receiving an XM signal.
None Found—no data matched the search criteria.
Off Course—you are off course by the distance set in the Off Course Alarm.
Proximity Memory Full—no additional proximity waypoints can be saved.
Proximity Radius Overlaps—the radius of two proximity waypoints overlap.
Route Already Exists—you have entered a route name that already exists.
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 more than 300
waypoints.
Route Waypoint Memory Full—no additional route waypoints can be saved.
Saving XM Program Information—an XM Radio channel lineup change has
occurred and the unit is saving the channel lineup to memory.
Shallow Water—the water is shallower than the amount set in the Shallow
Water Alarm.
Sonar Failed Unit Needs Repair—there is an internal problem with the unit.
Contact Garmin Product Support to have the unit serviced.
GPSMAP 396 Pilot's Guide