What is around me?
Using AIS
Card 16
AIS VECTOR
ON OFF
AIS DATA
AUTO ON OFF
VIEW FULL
AIS DATA
What is AIS?
AIS uses digital radio signals to broadcast ‘realtime’ information between vessels and shore based stations via dedicated VHF frequencies. This information is used to identify and track vessels in the surrounding area and to provide collision avoidance data. AIS will augment your radar application, as it can operate in radar blind spots.
In order to use the AIS feature, you will need a GPS and compass for timing and position information together with data from a suitable AIS receiver.
AIS target symbols
Sleeping target
Target not activated, dangerous or lost.
Activated target | COG/SOG | |||
Target activated i.e. AIS vector | vector |
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displayed. |
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Vector line (optional) shows predicted |
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distance travelled within given time. |
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| Heading |
How do I display AIS?
On chart windows:
PRESENTATION... CHART LAYERS...
On radar windows:
AIS LAYER
PRESENTATION... ON OFF
Toggle as required
AIS LAYER
ON OFF
Toggle as required
Selected target |
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Target selected with cursor. |
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Can activate the target and view |
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detailed data. | AIS |
Dangerous target |
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Targets within specified distance |
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(CPA) or time (TCPA). |
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Dangerous target alarm sounds |
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and target flashes. |
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How is AIS data displayed?
The AIS system displays other AIS equipped vessels in the surrounding area as targets overlaid on a chart or radar window. Up to 100 targets are displayed and are scaled according to the size of the vessel. A vector indicates the direction of travel of the vessel. As the vessel’s status changes, the symbol for the target will change accordingly.
You can view detailed AIS data, safety critical target information, Alarm message (ALR) and Safety Related Message (SRM) messages. You can also set up a safe zone.
How do I view target information?
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| AIS DATA |
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| AUTO ON OFF |
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| 125oT |
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| 7.7kt |
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| 01.30nm |
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| 12h15m30s |
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Uncertain target |
Calculated CPA/TCPA value uncertain. |
Lost target
When signal of a dangerous AIS target not received for 10 seconds.
Target orientated in COG or CSE direction as appropriate.
Alarm sounds and target flashes
WARNING:
Smaller vessels do not have to be fitted with AIS and whilst it is
mandatory for larger commercial vessels to carry AIS, its use is not. You should not assume that your AIS will display ALL vessels in your area.
How do I view detailed AIS data?
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| AIS Target info: Sim Target 6 |
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| MNSI 6 | COG 142oT |
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| Name Sim Target 6 | SOG 25,7kt |
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| VIEW FULL |
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| Call sign | CPA |
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| Last seen 01/01/2006 01:13:21AM | TCPA |
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| AIS DATA |
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| Lat 30O39’.702W | IMO No |
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| Lon 080o18'.702W | Dest |
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| Hdg 159oT | ETA |
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| Length | Status Under Way Using Engine |
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| Type Normal |
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| Beam |
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| Draught |
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? More information... | See the 'AIS' chapter of the reference manual for data classes and how |
to customise this feature. |