Description

Driver to decode data received from AIS (Automatic Identification System) Transponders.
This gives the user the opportunity to visualize all surrounding vessels when working in a certain area.
It is also possible to bring one of these AIS targets into the Navigation Display in the QINSy format, using the Other Ship's message.
The Own Ship's message could be used as a backup system should the survey positioning system fail.

Both VDO (Ship's Own) and VDM (Other vessels') messages are decoded.
The sentences are composed of several Message types.
The driver will only decode data from Message type 1, 2, 3 and 5.

The following data is decoded:

  • MMSI (Mobile Maritime Service Identity) number
  • Name
  • Call sign
  • Destination
  • Navigational status
  • Position (WGS'84)
  • SOG (Speed Over Ground) (knots)
  • COG (Course Over Ground) (deg)
  • Heading (deg)
  • ROT (Rate Of Turn) (deg/min)

The AIS Target received can be displayed Online / Replay in the Navigation Display.

Besides displaying the data the user may also use the VDO/VDM messages to decode a ship's position and heading as a separate Position Navigation System and Gyro System.
This option could be used as a backup during Anchor Handling with our Tug Management System.

It is not recommended to use the AIS readings as the primary positioning due to various limitations:

Limitations

  1. The update rate of the AIS target can vary depending on speed and distance from other targets.
  2. The position and heading accuracy depend on the source used (internal or external sensors) by the AIS transponder.
  3. The AIS messages do not contain a time tag and therefore the ages of the messages (observations) are unknown.

Driver Information

Driver

AIS Standard Messages

Interface Type Serial

Driver class type

Terminated

UTC Driver (question)

No

Input / Output Input

Executable

DrvQPSTerminated.exe

Related Systems
Related Pages

Database Setup

When this system is added and activated, all surrounding vessels can be viewed as targets in the Navigation Display.

Auxiliary System

First, add an AIS system to the setup:

It will be listed under the Auxiliary Systems in the tree on the left:

Should you wish to view one other vessel in particular (e.g. your ASV/crew tender/supplier etc.), then make sure to add this vessel to the setup and activate which messages from which systems need to be decoded. Complete the AIS Other Ship wizard.

Should you wish to view the AIS data of your own vessel then complete the AIS Own Ship wizard.

Object

Add the vessel to be viewed to your setup, using 'New Object'.

After completion of the wizard it will be listed in the tree:

AIS System

Right mouse click on the AIS system to add additional System drivers to decode Heading and Position from the VDM (Other ship's) messages.

Drivers

The messages can be transmitted via a network (UDP version of the driver) or via serial port.

Heading of the AIS target

To show the heading of the AIS target, follow the setup wizard:

Make sure to enter the correct MMSI number to ensure the display of the needed vessel:

Indicate from which vessel the AIS readings will be received:

Position of the AIS target

To show the position of the AIS target, follow the setup wizard:

Make sure to enter the correct MMSI number to ensure displaying the needed vessel:

Indicate from which vessel the AIS readings will be received and select the node at which the positioning antenna is placed:

The entries are shown in the tree on the left:

AIS System

Right mouse click on the AIS system to add additional System drivers to decode Position and Heading from the VDO (Ship's Own) messages.

The VDO message contains the ship's own position and heading and can be decoded when an AIS Transceiver on your vessel is connected to QINSy.

Drivers

The messages can be transmitted via a network (UDP version of the driver) or via serial port.

AIS Heading of the vessel

To show the AIS heading of the vessel, follow the setup wizard:

Indicate from which vessel the AIS readings will be received:

AIS Position of the vessel

To show the AIS position of the vessel, follow the setup wizard:

Indicate from which vessel the AIS readings will be received and select the node at which the positioning antenna is placed:

The entries are shown in the tree on the left:

QINSy Online

Computation Setup

To be able to view the other AIS target in the Navigation Display, make sure to activate it in the Computation Setup.

AIS messages are sent at quite large intervals, or at irregular intervals, therefore it may be useful to set the Max Age to 60 seconds instead of the default 5 seconds.

Navigation Display

All AIS targets are displayed when they are activated in the View Properties menu.
The bright green vessel on the left is the vessel as set up in Database Setup, the bright green vessel on the right is the Support vessel, of which position and heading are derived from the AIS messages.

Use the View - Target Selection option to find out the MMSI number of the vessel you would like to use as 'Other Ship' in your setup.

Additional Information

If a target has not been updated for more than 30 seconds (default), it will be removed.