1

022

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

Fragment number

7

Variable

Bulletin board payload

See bulletin board payload definition, Table 41.

Number of physical channels N

0-255

8

Number of physical channels defined in control station service area.

Physical channel 0 (PC0) number

0-255

8

Defines the first physical channel number.

PC0 channel frequency

As defined in Rec. ITU-R M.1084

12

Identification of centre frequency use channel numbering scheme defined in Recommendation ITU-R M.1084. Channel bandwidth is not according to Recommendation ITU-R M.1084 and is defined in PC0 bandwidth field below.

Default: 1284: 157.2375 MHz

Reserved

1

Reserved for future use.

PC0 bandwidth

0-2

2

0 – 25 kHz

1 – 50 kHz (reserved for future use)

2 – 100 kHz (default)

PC0 Tx flag

0 or 1

1

0 – mobile may not transmit on this PC

1 – mobile may transmit on this PC

PC0 RA selection interval

0-511

9

The Random Access scheme selection interval in hexslots. 0 for default.

PC0 short data message limit

0-127

7

Maximum allowed number of short data message transmissions on the RAC during a frame.

PC0 logical channel definition

See logical channel definition, Table 46.

Variable

Defines the logical channel definition of physical channel 0

…

…

…

...

Physical channel N (PCN) number

0-255

8

Defines the last physical channel number.

PCN channel frequency

As defined in ITU-R M.1084

12

Identification of centre frequency use channel numbering scheme defined in Recommendation ITU-R M.1084. Channel bandwidth is not according to Recommendation ITU-R M.1084 and is defined in PCN bandwidth field below. Default: 2284: 161.8375 MHz

Reserved

1

Reserved for future use.

PCN bandwidth

0-2

2

0 – 25 kHz

1 – 50 kHz (reserved for future use)

2 – 100 kHz (default)

PCN Tx flag

0 or 1

1

0 – mobile may not transmit on this PC

1 – mobile may transmit on this PC

PCN RA selection interval

0-511

9

The random access scheme selection interval in hexslots. 0 for default.

PCN short data message limit

0-127

7

Maximum allowed number of short data message transmissions on the RAC during a frame.

PCN logical channel definition

See logical channel definition, Table 46

Variable

Defines the logical channel definition of physical channel N.

TDMA 0 LC count

0-63

6

Number of LCs defined inside TDMA channel 0.

TDMA 1 LC count

0-63

6

Number of LCs defined inside TDMA channel 1.

TDMA 2 LC count

0-63

6

Number of LCs defined inside TDMA channel 2.

TDMA 3 LC count

0-63

6

Number of LCs defined inside TDMA channel 3.

TDMA 4 LC count

0-63

6

Number of LCs defined inside TDMA channel 4.

TDMA 5 LC count

0-63

6

Number of LCs defined inside TDMA channel 5.

LC 0 function

0-5

3

Slot function

0 – Bulletin board

1 – Random access

2 – Announcement signalling

3 – Data

4 – Data signalling

5 – Ranging

LC 0 repeat

0-511

9

Slot duration of function. When set to 0, the slot function is set to a duration of 1 slot and does not repeat.

…

…

…

...

LC N function

0-5

3

Slot function

0 – Bulletin board

1 – Random access

2 – Announcement signalling

3 – Data

4 – Data signalling

5 – Ranging

LC N repeat

0-511

9

Slot duration of function. When set to 0, the slot function is set to a duration of 1 slot and does not repeat.

Padding

0

4 if total number of LC definition pairs are even.

0 if total number of LC definition pairs are odd.

Padded with 0 valued bits to ensure byte alignment of logical channel definition.

Note: See § 4.13 for explanation.