A vessel receiving a route suggestion can choose to respond to the sender with the following message.
See http://enav.frv.dk/ais_route_suggestion.pdf(link is external) for usage and portrayal details.
Jens Kristian Jensen
Danish Maritime Authority
JKJ@dma.dk(link sends e-mail)
Route Suggestion Reply
|Parameter||No. of bits||Description|
|Message ID||6||Identifier for Message 6; always 6.|
|Repeat Indicator||2||Used by the repeater to indicate how many times a message has been repeated.
0 – 3
0 = default
3 = do not repeat anymore
|Source ID||30||MMSI number of source station.|
|Sequence Number||2||0 – 3; refer to ITU-R M.1371-3, Annex 2, § 5.3.1.|
|Destination ID||30||MMSI number of destination station.|
|Retransmit Flag||1||Retransmit Flag should be set upon retransmission.
0 = no retransmission = default
1 = retransmitted
|Spare||1||Not used. Set to zero.|
|IAI||16||DAC = 219; FI = 3|
|Message Linkage ID||10||A source specific running number, unique across all binary messages equipped with Message Linkage ID. Used to link additional information to the message by a Text Description message. The Message Linkage ID and the first six digits of the source MMSI uniquely identify the sent message.
1 – 1,023
0 = not available = default
|Referenced message||10||The suggestion id of the message responded to.|
|Response||6||0 = Accept – Ship intends to adjust active route
1 = Reject – Ship does not intend to adjust active route
2 = Noted – Ship acknowledges reception, but cannot, or will not, consider the suggestion.