Chapter 9 Specification 9-12
9.8.2 Input data
Protocol
Bit rate : 4800
Data bit : 8 bit
Parity : none
Start bit : 1
Stop bit : 1
interval : Automatic
version : IEC61162-1
Data sentence
IEC61162-1 RX1, RX2 port
HDT : Heading true
THS : True heading and status
ROT : Rate of turn
The priority of RX1, RX2 port sentence is as follows.
Heading RX1 HDT > RX2 HDT > RX1 THS > RX2 THS
Rate of turn RX2 ROT > RX1 ROT
IEC61162-1 RX3 port
VBW : Dual ground/water speed (Input water speed from JRC’s water SDME)
VLW : Dual ground/water distance (Input water distance from JRC’s water SDME)
Serial Alarm 1 port
Serial Alarm 2 port
ACK : Acknowledge alarm
ACN : Alert command
Dimmer Serial port
DDC : Display dimming control