Chapter 1: System Connections 13
SmartPilot computer NMEA inputs/outputs
Note:
Do NOT connect more than one piece of equipment to each SmartPilot computer
NMEA input.
NMEA connectivity overview
Note:
When connected to a NMEA navigator, S2 & S3 systems look at NMEA 1 first. If
NMEA 1 has no data, it then looks at NMEA 2. If both channels have the same type of nav-
igation data, NMEA 1 is used.
S1 Systems S2 & S3 Systems
The S1 has a single NMEA input/output to
receive and transmit information from
NMEA equipment.
S2 and S3 systems have two sets of NMEA
inputs/outputs to receive and transmit
information from NMEA equipment.
SmartPilot computer NMEA inputs
NMEA 0183
received
S1 S2 &
S3
Information extracted
APB ¸ ¸ cross track error, bearing to waypoint, waypoint
number
BWC
BWR
¸
¸
¸
¸
bearing to waypoint, distance to waypoint, way-
point number, time
GGA
GLL
¸
¸
¸
¸
latitude/longitude, time
HDG
HDM
HDT
¸
¸
¸
¸
¸
¸
heading
MWV ¸ ¸ apparent wind angle, apparent wind speed
RMA ¸ ¸ course over ground (COG), speed over ground
(SOG), latitude/longitude, variation
RMB ¸ ¸ cross track error, bearing to waypoint, distance to
waypoint, waypoint number
RMC ¸ ¸ course over ground (COG), speed over ground
(SOG), latitude/longitude, time, variation
VHW ¸ ¸ speed through water, heading
VTG ¸ ¸ course over ground (COG), speed over ground
(SOG)
VWR ¸ ¸ relative apparent wind angle, relative apparent
wind speed
XTE ¸ ¸ cross track error
ZDA ¸ ¸ time, date
81273_1.book Page 13 Thursday, November 10, 2005 8:25 AM
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