AIS Message Definitions

AIS Message: AidsToNavReport (::)

Description:

Used by a station mounted on an aid-to-navigation. Note IALA A-124 P.19 for more bits than are here. Also covered in A-126 in ANNEX 1 - MESSAGE 21 in IALA Recommendation A-126 on the use of AIS in Marine Aids to Navigation Serves Ed 1.1. This has optional extensions. What is the IALA Page 7 that Mueller refered to for the RegioanlApp field?

Note:aka AtoN

Note:Not tested

See Also:

Name NumberOfBits ArrayLength Type Units Description
MessageID 6 uint AIS message number. Must be 21 aka 'F'
RepeatIndicator 2 uint Indicated how many times a message has been repeated
0: default
3: do not repeat any more
UserID 30 uint Unique ship identification number (MMSI)
type 5 uint IALA type of aid-to-navigation
0: Default, Type of A to N not specified
1: Reference point
2: RACON
3: Off Shore Structure
4: Spare
5: Light, without sectors
6: Light, with sectors
7: Leading Light Front
8: Leading Light Rear
9: Beacon, Cardinal N
10: Beacon, Cardinal E
11: Beacon, Cardinal S
12: Beacon, Cardinal W
13: Beacon, Port hand
14: Beacon, Starbord hand
15: Beacon, Preferred channel port hand
16: Beacon, Preferred channel starboard hand
17: Beacon, Isolated danger
18: Beacon, Safe water
19: Beacon, Special mark
20: Cardinal Mark N
21: Cardinal Mark E
22: Cardinal Mark S
23: Cardinal Mark W
24: Port hand Mark
25: Starbord hand Mark
26: Preferred Channel Port hand
27: Preferred Channel Starboard hand
28: Isolated danger
29: Safe water
30: Special Mark
31: Light Vessel/LANBY
name 6 20 aisstr6 Name of the aid-to-navigation
PositionAccuracy 1 uint Accuracy of positioning fixes
0: low (greater than 10 m)
1: high (less than 10 m)
longitude 28 decimal degrees Location of the AtoN East West location
latitude 27 decimal degrees Location of the AtoN North South location
dim 30 uint FIX: break this out.
FixType 4 uint Type of electronic position fixing device
0: Undefined (default)
1: GPS
2: GLONASS
3: Combined GPS/GLONASS
4: Loran-C
5: Chayka
6: Integrated Navigation System
7: surveyed
8: not used - 8
9: not used - 9
10: not used - 10
11: not used - 11
12: not used - 12
13: not used - 13
14: not used - 14
15: not used - 15
timestamp 6 uint UTC second when report was generated
61: Positioning system is in manual mode
62: Electronic position fixing system operates in estimated mode
63: Positioning system is inoperative
OffPosition 1 bool True when the AtoN is off station
False: On position
True: Off position
RegionalApp 8 uint Should be set to zero
RAIM 1 bool Receiver autonomous integrity monitoring flag
False: not in use
True: in use
Spare 3 uint Not Used