Route information
Details:
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 |
| 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 |
| 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 |
| 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 |
| Number of Waypoints |
5 |
Number of waypoints.
1 – 16 |
| 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 |