User's Manual

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4
c--c
Text message
A.6.10 VDM – AIS VHF Data-Link Message
This sentence is used to transfer the entire contents of a received AIS message packet, as
defined in ITU-R M.1371 and as received on the VHF Data Link (VDL), using the “six-bit” field type.
!--VDM,x,x,x,a,s—s,x*hh<CR><LF>
Field No.
Format
Description
Remark
1
x
Total number of sentences needed to transfer the
message
2
x
Sentence number
3
x
Sequential message identifier
4
a
AIS channel
5
s—s
Encapsulated ITU-R M.1371 radio message
6
x
Number of fill-bits
A.6.11 VDO – AIS VHF Data-Link Own-Vessel Report
This sentence is used to transfer the entire contents of an AIS unit’s broadcast message
packet, as defined in ITU-R M.1371 and as sent out by the AIS unit over the VHF data link
(VDL) using the “six-bit” field type.
!--VDO,x,x,x,a,s—s,x*hh<CR><LF>
Field No.
Format
Description
Remark
1
x
Total number of sentences needed to transfer the
message
2
x
Sentence number
3
x
Sequential message identifier
4
a
AIS channel
5
s—s
Encapsulated ITU-R M.1371 radio message
6
x
Number of fill-bits