Coordinated universal time and date response

msg_ID: 
11
Description: 
Current UTC and date if available
Priority: 
3
Access scheme: 
RATDMA
ITDMA
Communication state: 
SOTDMA
Transmitted by: 
Mobile station
Parameter Number of bits Description
Message ID 6 Identifier for this Message 4 or 11
4 = UTC and position report from base station:
11 = UTC and position response from mobile station
Repeat indicator 2 Used by the repeater to indicate how many times a message has been repeated. Refer to § 4.6.1, Annex 2; 0-3; 0 = default; 3 = do not repeat any more
User ID 30 MMSI number
UTC year 14 1-9999; 0 = UTC year not available = default
UTC month 4 1-12; 0 = UTC month not available = default; 13-15 not used
UTC day 5 1-31; 0 = UTC day not available = default
UTC hour 5 0-23; 24 = UTC hour not available = default; 25-31 not used
UTC minute 6 0-59; 60 = UTC minute not available = default; 61-63 not used
UTC second 6 0-59; 60 = UTC second not available = default; 61-63 not used
Position accuracy 1 1 = high (£10 m)
0 = low (>10 m)
0 = default
The PA flag should be determined in accordance with Table 50
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)
Type of electronic position fixing device 4 Use of differential corrections is defined by field position accuracy above:
0 = undefined (default)
1 = global positioning system (GPS)
2 = GNSS (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
Transmission control for long-range broadcast message 1 0 = default – Class-A AIS station stops transmission of Message 27 within an AIS base station coverage area.
1 = Request Class-A station to transmit Message 27 within an AIS base station coverage area.
Base station coverage area should be defined by Message 23; If Message 23 is not received, the AIS station which is allowed to transmit on CH75 and 76 (see 3.2, Annex 4) should ignore this bit and transmit Message 27.
Spare 9 Not used. Should be set to zero. Reserved for future use
RAIM-flag 1 RAIM (Receiver autonomous integrity monitoring) flag of electronic position fixing device; 0 = RAIM not in use = default; 1 = RAIM in use see Table 50
Communication state 19 SOTDMA communication state as described in § 3.3.7.2.1, Annex 2
Number of bits 168