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| AIS |
 > Information > AIS |
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 AIS Configuration
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AIS Messages
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| Static |
MMSI number, IMO number, Call sign
Length and beam
Type of ship
Location of position-fixing antenna |
| Dynamic |
Ship’s position with accuracy indication and integrity status
Time in UTC
Course over ground (COG), Speed over ground (SOG)
Heading, Rate of turn (ROT),
Navigation status (e.g. Underway using engine/at anchor/not under command/restricted maneuverability) |
| Voyage related |
Ship’s draught
Cargo type
Destination and estimated time of arrival (ETA) |
| Safety related messages |
Broadcast message, Addressed message |
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General Requirement
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| Channel |
CH87B(161.975MHz), CH88B(162.025MHz) |
| Regional Frequency |
156.025 – 162.025MHz |
| Channel Separation |
12.5kHz/25kHz |
| Output Power |
12.5W/2.5W |
| Modulation & Bit Rate |
GMSK, 9,600bps +/-50ppm |
| Time Slot |
2,250 slots/min/CH, 1 slot=26.7ms (256bits) |
| Navigation Related data |
UTC, Longitude, Latitude, COG, SOG, Heading, Rate of Turn,etc. |
| Information Update Rate |
Static Information : Every 6 min or when data amended or on request
Dynamic Information :
Ship at anchor and not moving faster than 3 knots ………………… 3 min
Ship at anchor or moored and moving faster than 3 knots ………… 10 sec
Ship 0-14 knots …………………………………………………………… 10 sec
Ship 0-14 knots and changing course ……………………………… 3 1/3 sec
Ship 14-23 knots …………………………………………………………… 6 sec
Ship 14-23 knots and changing course ………………………………… 2 sec
Ship > 23 knots …………………………………………………………… 2 sec
Ship >23 knots and changing course …………………………………… 2 sec
Voyage Related Information : Every 6 min or when data amended or on request
Safety Related Message as required |
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Carriage Requirements (from MSC72 & MSC73)
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| Ship's type |
Constructed date |
Carriage deadline |
| Before 1 July 2002 |
On & after 1 July 2002 |
Const. date |
1 July 2003 |
1st survey after 1 July 2003 |
1 July 2004 |
1 July 2005 |
1 July 2003 |
1 July 2003 |
1 July 2003 |
| Int'l Voyage ships |
All Passenger ships of 300GT & upward. |
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| All passenger ships. |
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| Tankers of 300GT & upward. |
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| Ships of 50,000GT & upwards. Excl. passenger ships & tankers |
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| Ships of 10,000GT & upwards but less than 50,000GT. Excl. passenger ships & tankers |
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| Ships of 3,000GT & upwards but less than 10,000GT. Excl. passenger ships & tankers |
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| Ships of 300GT & upwards but less than 3,000GT. Excl. passenger ships & tankers |
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| Non int'l Voyages |
All passenger ships of 500GT & upward. |
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