10 |
Introduction | MX610/MX612 Operator and Installation Manual
D/GPS Indicator
Icon Description Denition
No Position
fix
Not tracking satellites (no position update). This is normal
the very 1st time you turn on the unit. It takes a few
seconds to get a fix.
DGPS Position
Position Fix is differentially corrected using RTCM
corrections from beacon stations. This is the normal
operating condition. Position accuracy is better than 1
meter.
DGPS Position
Position Fix is augmented using the SBAS (WAAS, EGNOS
or MSAS) signal correction. Position accuracy is better
than 5 meters.
Note: SBAS correction is not an IMO compliant system.
Good GPS
position
GPS Position is good but selected DGPS correction is
temporarily not available. When DGPS mode menu is set
to either Beacon or WAAS.
Good GPS
position
Good GPS position fix indication when MX610/MX612 is
operated in autonomous GPS only mode DGPS mode
setting is OFF.
RAIM Status
RAIM (Receiver Autonomous Integrity Monitoring) is a fault-detection feature required by IMO
for type-approved GPS units. It is another layer of safety that alerts the operator that a condi-
tion may exist in the GPS positioning solution that reduces the desired accuracy of the ship’s
position. This feature requires at least five GPS satellites to operate properly, four satellites or
less will indicate a RAIM caution condition (R?). If the statistical RAIM error exceeds a specified
limit (100 meters-default) a RAIM Unsafe (R-) alarm will be indicated. This means that the RAIM
estimated position error is equal or greater than the preset limit. The operator is advised to
take extra precautionary measures when using the navigation solution until the RAIM indica-
tor switches to RAIM safe (R+) condition.
Icon Description Denition
R+
RAIM Safe Position error is less than 100 meters (RAIM alarm limit)
R-
RAIM Unsafe
Position error is equal or more than the 100 meter RAIM
alarm limit
R?
RAIM Caution
Not enough satellites are available. RAIM requires 5 (or
more) satellites for proper operation.
Alarm condition
A red bell icon indicates an alarm fault has been detected.
The bell icon will be grayed-out when the alarm is
corrected.
The RAIM feature and RAIM alarm can be turned ON or OFF using the procedure below:
1. Press the MENU key.
2. Scroll down to Tools & Settings menu, press ENT.
3. Select the GPS icon, press ENT.
4. Scroll to Enable RAIM (or RAIM Alarm), press the ENT key to remove or leave a check mark.
5. Press the CLR key several times or any hot keys to exit.
¼ Note: IMO regulations require that RAIM feature be on at all times.
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