Technical Manual
Table Of Contents
- 1 Revision History
- 2 SPECIFICATIONS
- 3 DATA TRANSMISSION
- 4 DESCRIPTION OF SENTENCE FORMAT
- 4.1 Input
- 4.1.1 ABM Addressed Binary and safety related Message
- 4.1.2 ACA AIS Regional Channel Assignment Message
- 4.1.3 ACK Acknowledge alarm
- 4.1.4 AIR AIS Interrogation Request
- 4.1.5 AIQ - Query Sentence
- 4.1.6 BBM Broadcast Binary Message
- 4.1.7 DTM Datum reference
- 4.1.8 EPV – Command or report equipment property value
- 4.1.9 GBS GNSS satellite fault detection
- 4.1.10 GGA Global positioning system (GPS) fix data
- 4.1.11 GLL Geographic position latitude/longitude
- 4.1.12 GNS GNSS fix data
- 4.1.13 HBT Heart Beat
- 4.1.14 HDT Heading true
- 4.1.15 LRF Long Range Function
- 4.1.16 LRI Long-Range Interrogation
- 4.1.17 OSD Own ship data
- 4.1.18 RMC Recommended minimum specific GNSS data
- 4.1.19 ROT Rate of turn
- 4.1.20 SPW - Security password sentence
- 4.1.21 SSD Station static data
- 4.1.22 VBW Dual ground/water speed
- 4.1.23 VSD Voyage Static Data
- 4.1.24 VTG Course over ground and ground speed
- 4.1.25 ZDA – Time and date
- 4.2 Output
- 4.2.1 ABK Addressed and binary broadcast acknowledgement
- 4.2.2 ACA See “Input “
- 4.2.3 ALR Set alarm state
- 4.2.4 EPV See “Input “
- 4.2.5 HBT See “Input “
- 4.2.6 LRF See “Input “
- 4.2.7 LR1 Long-range Reply with destination for function request "A"
- 4.2.8 LR2 Long-range Reply for function requests "B, C, E, and F"
- 4.2.9 LR3 Long-range Reply for function requests "I, O, P, U and W"
- 4.2.10 NAK – Negative acknowledgement
- 4.2.11 TRL – AIS transmitter non functioning log
- 4.2.12 TXT Text transmission
- 4.2.13 VDM VHF Data-link Message
- 4.2.14 VDO VHF Data-link Own-vessel message
- 4.2.15 VER – Version
- 4.1 Input
- 5 Abbreviations and Definitions
TR-8000 Technical manual 4-14
4 DESCRIPTION OF SENTENCE FORMAT
The following provides a summary explanation of the approved sentence structure according to IEC 61162:
$aaccc, c---c*hh<CR><LF>
ASCII
HEX
Description
"$"
24
Start of sentence: starting delimiter
aaccc
Address field: alphanumeric characters identifying type of talker,
and sentence formatter. The first two characters identify the
talker. The last three are the sentence formatter mnemonic code
identifying the data type and the string format of the successive
fields. Mnemonics will be used as far as possible to facilitate
read-outs by users.
","
2C
Field delimiter: starts each field except address and checksum
fields. If it is followed by a null field, it is all that remains to
indicate no data in a field.
c---c
Data sentence block: follows address field and is a series of data
fields containing all of the data to be transmitted. Data field
sequence is fixed and identified by the third and subsequent
characters of the address field (the sentence formatter). Data
fields may be of variable length and are preceded by delimiters ",".
"*"
2A
checksum delimiter: follows last data field of the sentence. It
indicates that the following two alpha-numeric characters show
the HEX value of the checksum.
hh
Checksum field: the absolute value calculated by exclusive-
OR'ing the eight data bits (no start bits or stop bits) of each
character in the sentence between, but excluding, "$" and "*".
The hexadecimal value of the most significant and least
significant four bits of the result are converted to two ASCII
characters (0-9, A-F) for transmission. The most significant
character is transmitted first. The checksum field is required in all
cases.
<CR><LF>
0D 0A
End of sentence: sentence terminating delimiter.