Route information
13.1 This message allows the communication of pertinent vessel routing information. It should only be used in when important route information (e.g., mandatory or recommended route(s)) – not already provided by current official nautical charts or publications – needs to be relayed by authorities or vessels.
13.2 This message can be broadcast or addressed, depending on which alternative is more appropriate.
13.3 The information is time-dependent (i.e. has start date and time and duration).
13.4 In order to allow advance notice, this message should be transmitted prior to the start date and time specified for the routing information. It should not be transmitted more than one day in advance.
13.5 This message should not be transmitted beyond the designated date and time except for a cancellation message. A cancellation message can be transmitted using the same Message Linkage ID with Route Type of 31 (cancellation), a Duration of 0 and start date and time fields all set to not available.
13.6 ECDIS/ECS software should automatically remove the contents of the Route Information binary message from the display after the end date and time or after receiving a cancellation message.
13.7 Up to 5-slot messages can be created, however messages with more than 3 slots should be avoided.
13.8 The Message Linkage ID can be used to link additional text (e.g., a separate text message). However, the same source MMSI needs to be included in both the Route Information and additional Text Description message.
Table 13.1
Route information – (broadcast)
| Parameter | No of bits |
Description |
| Message ID | 6 | Identifier for Message 8; always 8. |
| 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. |
| Spare | 2 | Not used. Set to zero. |
| IAI | 16 | DAC = 001; FI = 27. |
| 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 |
| Sender Classification | 3 | 0 = ship = default
1 = authority 2 – 7 (reserved for future use) |
| Route Type | 5 | 0 = not available = default
1 = mandatory route 2 = recommended route 3 = alternative route 4 = recommended route through ice 5 = ship route plan 6 – 30 (reserved for future use) 31 = cancellation (cancel route as identified by Message Linkage ID) |
| Start Date and Time | Start UTC date and time. | |
| UTC Month | 4 | 1 – 12
0 = not available = default |
| UTC Day | 5 | 1 – 31
0 = not available = default |
| UTC Hour | 5 | 0 – 23
24 = not available = default |
| UTC Minute | 6 | 0 – 59
60 = not available = default |
| Duration
|
18 | Minutes until end of validity of the route. Measured from start time of Route Information.
0 = cancel route 262,143 = not available = default |
| Number of Waypoints | 5 | Number of Waypoints
1 – 16 0 = no waypoint = default 17 – 31 (not used) |
| Waypoints | n x 55 | Variable number of waypoints 1 – 16 (55 bit each), refer to Table 13.3. The number of waypoints is determined by the length of the message. |
| Spare | 0 | Not used. Set to zero. |
| Total | 172 – 997 | Occupies 2 – 5 slots (see Table 13.4) |
Table 13.2
Route information – (addressed)
| 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 = 001; FI = 28
(See Rec. ITU-R M.1371-3, Annex 5, § 2.1) |
| 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 |
| Sender Classification | 3 | 0 = ship = default
1 = authority 2 – 7 (reserved for future use) |
| Route Type | 5 | 0 = not available = default
1 = mandatory route 2 = recommended route 3 = alternative route 4 = recommended route through ice 5 = ship route plan 6 – 30 (reserved for future use) 31 = cancellation (cancel route as identified by Message Linkage ID) |
| Start Date and Time | Start UTC date and time. | |
| UTC Month | 4 | 1 – 12
0 = not available = default |
| UTC Day | 5 | 1 – 31
0 = not available = default |
| UTC Hour | 5 | 0 – 23
24 = not available = default |
| UTC Minute | 6 | 0 – 59
60 = not available = default |
| Duration
|
18 | Minutes until end of validity of the route. Measured from start date and time of Route Information.
0 = cancel route 262,143 = not available = default |
| Number of Waypoints | 5 | Number of waypoints.
1 – 16 0 = no waypoint = default 17 – 31 (not used) |
| Waypoints | n x 55 | Variable number of waypoints 1 – 16 (55 bit each), refer to Table 13.3. The number of waypoints is determined by the length of the message. |
| Spare | Not used. Set to zero. | |
| Total | 204 – 1,029 | Occupies 2 – 5 slots (see Table 13.4) |
Table 13.3
Waypoints
| Parameter | No of bits |
Description |
|---|---|---|
| WP i. Longitude | 28 | Longitude in 1/10,000 min, ±180 degrees as per 2’s complement (East = positive, West = negative).
181 = not available = default |
| WP i. Latitude | 27 | Latitude in 1/10,000 min, ±90 degrees as per 2’s complement (North = positive, South = negative).
91 degrees = not available = default |
Table 13.4
Number of slots
| Number or waypoints transmitted | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| Number of slots used for a broadcast message | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 5 |
| Number of slots used for an addressed message | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 5 | 5 |