1

90

1

Type

2

0 to 2¹⁶-1

2

Length

Total packet size in bytes.

3

0 to 2³²-1

4

Original source ID

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

4

0 to 2³²-1

4

Node source ID

Unique identifier of the current node transmitting the message, as described in § 2.4, Annex 1.

5

0 to 2³²-1

4

Node destination ID

Unique identifier of the current node receiving the message, as described in § 2.4, Annex 1.

6

0 to 2³²-1

4

Original destination ID

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

7

0-255

1

Priority

Set to 0. Reserved for future use.

8

0 to 2³²-1

4

Terminal capabilities

This field is a 32-bit bitmask with each bit set to indicate capabilities/restrictions of a unit:

Bit 0: All bandwidths and modulation schemes as per VDE v1.0 supported.

Bit 1: Unit has only 1 VDE receiver.

Bits 2 to 31: Reserved for future use. Should be set to zero.

Note: The Resource request message will be transmitted on the RAC by ships and ASC by shore stations.

The four maritime mobile service identity (MMSI) numbers could allow for multiple hops of data messages between many stations. This functionality is reserved for future use. The original source and original destination IDs are the end points of the communication while the node source and node destination IDs are the immediate stations communicating with each other during the current hop.