21NMEA-NX2.doc Page 4 Latest update: 27 Jan -03
Each sentence is ended with a <CR><LF> (Hex 0D 0A).
Notes:
• BWR contains exactly the same information as the BWC sentence. It does
not contain rhumb line data. It is intended as a service for receivers that does
not accept the BWC sentence.
• BW1 is a shorter version of BWC where Time and Destination WayPoint
Position is not sent (or rather sent as null fields).
• The transmitted sentence will be "BWC" not "BW1" (as can be seen above). It
is intended mainly for Silva's MAXI-Repeaters.
• WPL (WayPoint Location) is only sent if C74-WPT (in the MULTI-Instrument
SET-UP is set to ON). When set to ON each time a WPL sentence is
transmitted it will contain the next defined WayPoint. When the last defined
WayPoint is reached it will restart with the first again....
• All WayPoint IDs are sent as a three digits (minimum) number. It is possible
to send (and receive) WayPoints from any block of 100 WayPoints by setting
C78-WBN (WayPoint Base Number) equal to the wanted block number.
Example:
If C78 is set to 03 WP-23 will be transmitted as number 323.
Note: All WP IDs will be equally affected.
• ZDA contains only UTC time, not date. The date is not transmitted in any
NMEA sentence by the Server.
• RA1 sentence is equal to VHW (Water Speed and Heading) with the major
deviation that the boat speed is replaced by the race timer count down until
the race-timer shows a positive value (i.e. when the race has started). The
Race timer is sent as if it was a negative boat-speed with seconds as
decimals. This sentence is only available from NEXUS Server units version
2.5 and later.
•
The only proper use for this sentence is together with the Silva MAXI-Repeaters.
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