1

020

1

Type

2

0 to 2¹⁶-1

2

Length

Total size in bytes, variable

3

0 to 2³²-1

4

Source ID

The unique identifier of the transmitting station, as described in § 2.4, Annex 1.

4

0 to 255

1

Control station ID

5

0 to 2¹⁶-1

2

Bulletin board version

Version number of this bulletin board

All valid versions are stored in the ship terminal (includes configuration message)

6

0 to 255

1

Number of fragments

Should be a value from 1 to 6 (TBC)

7

Variable

Bulletin board payload

See bulletin board payload definition in Table 41

1

0 to 2³²-1

4

Start time for this version

UTC start time for this version of the bulletin board in number of seconds since 1 January 2000 00:00:00 UTC

2

0 to 2¹⁶-1

2

Validity of this version

Lifetime of this version in number of 1 minute frames

Up to 45 days

3

0 to 255

1

TDMA frame size

The size of TDMA frames in hexslots.

May have the following values: 2, 3, 5, 6, 9, 10, 15 (default)

Only 15 have to be supported.

4

Variable

Physical channel definitions

See physical channel definition in Table 45.

5

0 to 255

1

Modulation, coding and protocol versions supported

Reserved for future use. Set to zero.

Defines a mandatory base set and optional more capable versions. Network ID segmentation could be used to distinguish different network types.

ASM reception flag one of the parameters for satellite.

Reserved for future use. Should be set to 0.

6

9

Control station service area point 1

Parameter (longitude and latitude) defining the control station service area North East corner.

GNSS rectangle longitude and latitude as defined in Recommendation ITU-R M.1371. See Table 42 – control station service area.

7

64

Authentication and integrity sequence

Reserved for future use. Set to zero.

Longitude of point 1

18

Longitude of area to which the assignment applies; upper right corner (North-East); in 1/10 min, or 18 MSBs of addressed station ID 1 (±180°, East = positive, West = negative)
181 = not available

Latitude of point 1

17

Latitude of area to which the assignment applies; upper right corner (North-East); in 1/10 min, or 12 LSBs of addressed station ID 1, followed by 5 zero bits
(±90°, North = positive, South = negative)
91° = not available

Longitude of point 2

18

Longitude of area to which the assignment applies; lower left corner (South-West); in 1/10 min, or 18 MSBs of addressed station ID 2 (±180°, East = positive, West = negative)

Latitude of point 2

17

Latitude of area to which the assignment applies; lower left corner (South-West); in 1/10 min, or 12 LSBs of addressed station ID 2, followed by 5 zero bits (±90°, North = positive, South = negative)

Padding

2

Padding bits for byte alignment. Set to zero.