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78 GPSMAP 640 Owner’s Manual
Appendix
Invalid Entry. Default value selected—an invalid entry was
entered.
Invalid MMSI
—an invalid DSC MMSI was entered.
Leaving Target Water Temperature
—(temperature sensor/
transducer) the water temperature is outside the user-dened target
temperature zone.
Lost Heading Sensor Connection—(NMEA) the unit has lost
communications with the heading sensor. Check wiring.
Lost Satellite Reception—the unit has lost satellite reception.
Make sure you have a clear view of the sky.
Map Format Is Not Supported
—a map format on a
preprogrammed SD card is not supported.
Marine Weather Warning—(XM WX weather) there is a weather
warning in effect.
NMEA Depth Is Below Transducer
—(sonar) the NMEA depth
input is using the DBT sentence which does not include keel offset.
No DGPS Position—the unit lost differential GPS reception
(WAAS). Make sure you have a clear view of the sky.
No Proximity Waypoints Found—no proximity waypoints found
while attempting a user data transfer.
No Routes Found—no routes found while attempting a user data
transfer.
No Tracks Found
—no tracks found while attempting a user data
transfer.
No User Waypoints Found
—no user waypoints found while
attempting a user data transfer.
No XM Signal—(XM WX weather) no XM satellite signal
detected. Make sure you have a clear view of the sky.
Not All Maps Fit, Some Maps Will Not Be Drawn
—there are
more maps present on the SD card than what the unit can support.
Some of the maps on the card will not be drawn or used to nd
map features.
Off Course Alarm
—the boat has left the user-dened course.
Proximity Alarm
—the boat has come close to a user-dened
proximity point.
Proximity Alarm Memory is Full
—the proximity waypoint
memory is full. Erase existing proximity waypoints to make room.
Proximity Overlaps Another Proximity Waypoint
—a proximity
point is overlapping another proximity waypoint.
86


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