VTT – Vessel Tracking and Tracing

It is one of the four services offered by the RIS System. Its task is to observe and manage the movement of ships from land using the following tools:


AIS​ systems

Vessel tracking and tracing is mainly carried out using Inland AIS, which is a broadcasting system based on the transmission of very high frequency radio signals between ship AIS stations (mobile stations) and land-based AIS stations.


VHF​ systems

The system is used for land-ship and ship-ship communications.​

  • ship-ship channel 10
  • ship-land channel 74


CCTV​ video surveillance

The video monitoring system is particularly important in places strategic for shipping, such as bridges, forks, bends, quays. View of the cameras deployed in the entire area of ​​the system’s operation allows for constant control of vessel traffic and enables reconstruction of dangerous events.


The DGPS measurement technique allows for greater accuracy than with the standard measurement with one receiver. This method involves the use of a base station – a receiver set up at a precisely designated point, which determines the differential corrections for individual satellites on an ongoing basis. The second receiver (mobile) must be able to receive the transmitted corrections via AIS. Corrections are transmitted in RTCM format. The application automatically generates an AIS 17 message and sends it via the AIS base station to the ships. AIS stations on ships automatically includes the AIS message 17.​

The VTT service contributes to greater safety and efficiency in inland navigation by:

  • navigation support,
  • disaster mitigation,
  • transport management,
  • an exchange of information.