Raymarine Ray215e - Manual (Page 77)

4-22 Operation with Full Function Handset
If a GPS device is not connected via NMEA, the radio emits a 5-second-
long staccato alert tone and flashes the NMEA indicator 2 minutes after
power up. This occurs every time the unit is turned on. The alarm is required
by safety regulations and cannot be disabled.
Operation at Power Up
At power up, the radio monitors the NMEA line for 1 minute. If a signal
is detected on NMEA, the radio determines whether the data is valid. If
valid, the data is accepted and the NMEA indicator is displayed on the
LCD.
If no GPS signal is detected on NMEA after the 1 minute monitoring
period, a 5-second-long staccato alert tone is emitted and the NMEA
indicator flashes. All the position fields are set to 9’s and the time and
date fields are set to 8’s. The message NO GPS appears in the NAVSTAT
screen, although no positional data is displayed.
If at a later time valid data is received on NMEA, the data is accepted and
the NMEA indicator is displayed solid (no longer flashing).
Operation When the Signal is Lost or Becomes Invalid
If positional data that was previously detected becomes invalid or is no
longer detected, the radio monitors the NMEA line for 1 minute for it to
be restored.
If a signal is restored on the NMEA line and the radio determines the data
is valid, the data is accepted and the NMEA indicator returns to a solid
state (not flashing).
However, if no signal is detected, the NMEA indicator flashes and a 5-
second-long staccato alert tone is emitted. The last received positional
data is retained in memory and can be viewed in the NAVSTAT screen.
The message NO GPS appears in NAVSTAT in the position where the
type of device used to be. The NMEA indicator continues to flash until
valid positional data is received. If valid positional data (from the same
source) is later restored, the NMEA indicator is again displayed solid.
Operation When No Signal Detected for 4 Hours
If no valid positional data is received or input manually within 4 hours of
the previous alert, the NMEA indicator continues to flash and the staccato
alert tone is again emitted. This pattern is repeated every 4 hours if no
positional data has been detected. If no manual input was made during
the previous 23.5 hours, all the position fields are set to 9’s and the time
and date fields are set to 8’s.