GPS NAVIGATOR
When used as a navigator, it will take the NMEA position data from a NMEA GPS
Antenna or a navigator, then use the internal waypoints and sail plans as if it was a sole
GPS NAVIGATOR.
8 NMEA DATA
SILVA NMEA 0183 Input/Output
This document gives a description of the NMEA 0183
sentences sent and received by the GPS navigator instrument
HDC (Heading Comppass) and BSP (Boat speed) is also sent out on NMEA when
available from the NEXUS Network.
When used as a NMEA repeater, all data will be retransmitted on to the NEXUS
Network.
Note! In the CONFIG SETUP there is a choice between
NMEA-01i83 and , RTCM Input. If RTCM is selected the NMEA
Input port is used for RTCM (DGPS) corrections only. The
NMEA 0183 output will only operate normal as long as the
RTCM Input is set to 4800 baud (bits/sec).
Output
The output from the GPS Navigator instrument is divided into 8 different "time-slots".
The required NMEA sentence can, be selected (or de-activated) individually for each
slot. The complete period for all slots is two seconds, so the time between each slot is
¼ sec.
Data that is not available will be sent with null fields.
Checksum is added on all sentences. Talker ID (address character 1 and 2) is always
GP (GPS source).
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