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Simrad MX500 | 139

Other Special Cases Affecting NMEA 0183

Records:

BWC, BWR, APA, APB, RMB, RMC, and Man Over Board

(MOB):

During the period when the Man Over Board function

is activated, NMEA 0183 records which contain bearing

and range data, such as those identified above (but not

limited to these), will reflect the bearing and range back

to the MOB position until the MOB function is canceled.

Refer to the MOB section of this manual.

APA, APB, XTE, and the Navigation Autopilot Alarm:

Refer to the CFG Navigation section. When the Autopilot

Alarm is set to No, the receiver always indicates a mode

‘A’, or valid data to the autopilot or other marine device

which might be receiving this data. If the Autopilot Alarm

is set to Yes, then the receiver changes the mode ‘A’ to

‘V’, indicating invalid data when you reach a waypoint

or exceed your cross-track error limit set in the CFG

Navigation XTE Limit field. When the alarm is canceled,

which requires your highlighting of the Cancel Alarm

softkey then pressing ENT (displayed during the alarm

condition), these data fields will revert to Valid data and

the autopilot will accept the receiver data again. This is

provided as a safety feature so that the boat does not

turn toward a new direction without your knowing of the

impending change.

Output Port Configuration Conflicts:

The NMEA output ports can only be assigned once. If you

have already defined a given port for one format, and

you attempt to define a different format for the same

port, the receiver will warn you of the port conflict. The

first format to be defined on a port maintains the port.

The second format will be ignored.

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Memorex RX 1 Smart Installationshandbuch Seite 140