|
Parameter
|
Number of bits
|
Description
|
|
Message ID
|
6
|
Identifier for Message 9; always 9
|
|
Repeat indicator
|
2
|
Used by the repeater to indicate how many times a message has been repeated. 0-3; 0 = default; 3 = do not repeat any more
|
|
User ID
|
30
|
MMSI number
|
|
Altitude (GNSS)
|
12
|
Altitude (derived from GNSS or barometric (see altitude sensor parameter below)) (m) (0-4 094 m) 4 095 = not available,
4 094 = 4 094 m or higher
|
|
SOG
|
10
|
Speed over ground in knot steps (0-1 022 knots)
1 023 = not available, 1 022 = 1 022 knots or higher
|
|
Position accuracy
|
1
|
1 = high (£10 m)
0 = low (>10 m)
0 = default
|
|
Longitude
|
28
|
Longitude in 1/10 000 min (±180°, East = positive (as per 2’s complement), West = negative (as per 2’s complement);
181 = (6791AC0h) = not available = default)
|
|
Latitude
|
27
|
Latitude in 1/10 000 min (±90°, North = positive (as per 2’s complement), South = negative (as per 2’s complement);
91 = (3412140h) = not available = default)
|
|
COG
|
12
|
Course over ground in 1/10 = (0-3 599). 3 600 (E10h) = not available = default; 3 601-4 095 should not be used
|
|
Time stamp
|
6
|
UTC second when the report was generated by the EPFS (0-59 or 60 if time stamp is not available, which should also be the default value
or 61 if positioning system is in manual input mode or 62 if electronic position fixing system operates in estimated (dead reckoning) mode
or 63 if the positioning system is inoperative)
|
|
Altitude sensor
|
1
|
0 = GNSS
1 = barometric source
|
|
Spare
|
7
|
Not used. Should be set to zero. Reserved for future use
|
|
DTE
|
1
|
Data terminal ready (0 = available 1 = not available = default)
|
|
Spare
|
3
|
Not used. Should be set to zero. Reserved for future use
|
|
Assigned mode flag
|
1
|
0 = Station operating in autonomous and continuous mode = default
1 = Station operating in assigned mode
|
|
RAIM-flag
|
1
|
RAIM flag of electronic position fixing device; 0 = RAIM not in use = default; 1 = RAIM in use
|
|
Communication state selector flag
|
1
|
0 = SOTDMA communication state follows
1 = ITDMA communication state follows
|
|
Communication state
|
19
|
SOTDMA communication state if communication state selector flag is set to 0, or ITDMA communication state if communication state selector flag is set to 1
|
|
Number of bits
|
168
|
|
