Static Data Payload
The Static Data Payload format is intended to mirror Message 5 Ship Static and Voyage Related Data format contained in ITU-R M.1371-5. The table contained here is informational.
Implementers should refer back to ITU-R M.1371-[current revision] for most up to date bit usage and descriptions. The Static Data Payload prior to encryption without bit stuffing is 440 bits in length. Conforming to the AES Encryption scheme with a 128-bit cipher key, the encrypted part of the payload then effectively becomes 512 bits in length to create blocks of 128 bits. The FID 57 static data report shall be transmitted once every 6 minutes.
NOTE: The Message 5 two (2) bit REPEAT INDICATOR field, normally located between FUNCTION ID and USER ID, is omitted in the EAIS Static Data Payload (See below).
|
Parameter |
Number of bits |
Description |
Encryption Status |
|
DAC |
10 |
Identifier for this message: 366 |
Unencrypted |
|
Function ID |
6 |
Function Identifier: 57 |
Unencrypted |
|
Repeat Indicator |
0 |
Not present in EAIS Static Data Payload |
no bits |
|
User ID |
30 |
MMSI number. |
AES encrypted |
|
AIS Version Indicator |
2 |
0 = station compliant with Recommendation ITU-R M.1371-1 1 = station compliant with Recommendation ITU-R M.1371-3 (or later) 2 = station compliant with Recommendation ITU-R M.1371-5 (or later) 3 = station compliant with future editions |
AES encrypted |
|
IMO number |
30 |
0 = not available = default – Not applicable to SAR aircraft 0000000001-0000999999 not used 0001000000-0009999999 = valid IMO number 0010000000-1073741823 = official flag state number |
AES encrypted |
|
Call sign |
42 |
7 x 6 bit ASCII characters "@@@@@@@" = not available = default Craft associated with a parent vessel, should use “A” followed by the last 6 digits of the MMSI of the parent vessel. Examples of these craft include towed vessels, rescue boats, tenders, lifeboats and life rafts. |
AES encrypted |
|
Name |
120 |
Maximum 20 characters 6 bit ASCII, "@@@@@@@@@@@@@@@@@@@@" = not available = default. The Name should be as shown on the station radio license. |
AES encrypted |
|
Type of ship and cargo type |
8 |
0 = not available or no ship = default; 1 - 99 = as defined in 1371-5 100 - 199 = preserved, for regional use; 200 - 255 = preserved, for future use. Not applicable to SAR aircraft |
AES encrypted |
|
Dimension/Reference for Position |
30 |
Reference point for reported position; Also indicates the dimension of ship in meters |
AES encrypted |
|
Parameter |
Number of bits |
Description |
Encryption Status |
|
Type of Electronic Position Fixing Device |
4 |
0 = Undefined (default) 1 = GPS 2 = GLONASS 3 = Combined GPS/GLONASS 4 = Loran-C 5 = Chayka 6 = Integrated Navigation System 7 = surveyed 8 = Galileo 9 - 14 = not used 15 = internal GNSS |
AES encrypted |
|
ETA |
20 |
Estimated Time of Arrival; MMDDHHMM UTC Bits 19 - 16: month; 1 - 12; 0 = not available = default; Bits 15 - 11: day; 1 - 31; 0 = not available = default; Bits 10 - 6: hour; 0 - 23; 24 = not available = default; Bits 5 - 0: minute; 0 - 59; 60 = not available = default |
AES encrypted |
|
Maximum Present Static Draught |
8 |
in 1/10 m, 255 = draught 25.5 m or greater, 0 = not available = default; in accordance with IMO Resolution A.851 |
AES encrypted |
|
Destination |
120 |
Maximum 20 characters using 6-bit ASCII; "@@@@@@@@@@@@@@@@@@@@" = not available |
AES encrypted |
|
DTE |
1 |
Data terminal ready (0 = available, 1 = not available = default) |
AES encrypted |
|
Spare |
1 |
Spare. Not used. Should be set to zero. |
AES encrypted |
|
Checksum |
8 |
Exclusive OR (XOR) 8-bit |
AES encrypted |
|
Stuffed bits |
88 |
Stuffed bits are inserted so that the number of bits in the encrypted field is a multiple of 128 bits (512 for this message); set to zero. |
AES encrypted |
|
TOTAL |
528 |
16 unencrypted bits plus 512 encrypted bits |
|
