FAQ

What is AIS?

Which information is received from vessels?

Are all vessels displayed?

How often is information updated?

Which is the vessels’ visibility from the shore?

How to authorize?

What can I do for improvement of this service?


What is AIS?

AIS is an Automatic Identification System providing automatic exchange of the most important navigational information between vessels and coastal stations at VHF range (161.975 MHz and 162.025 МHz). It supplements to a considerable extent conventional shipborne navigation sets designed on the basis of radar systems.

Which information is received from vessels?

AIS onboard stations transmit dynamic navigational information (position, course, velocity, turning rate, etc.), route/voyage data (destination, expected time of arrival, cargo type) and static information (vessel’s name and call signal, dimensions, current draft), which is displayed on monitors of neighbouring vessels and received by coastal AIS stations.

Are all vessels displayed?

In compliance with SOLAS-74 (Safety of Life at Sea Convention) Chapter V Regulation 9 as amended all ships over 300 tons that are engaged in international routes, as well as passenger ships irrespectively of their size must be fitted with AIS. Other vessels (non-SOLAS) may carry AIS optionally.

How often is information updated?

Information is updated every 5 minutes in a guest mode. In an authorized mode the data is updated every 30 seconds (users can increase the update rate depending on their Internet connection).

Which is the vessels’ visibility from the shore?

Coastal station’s range of information reception from onboard AIS depends on the height of aerial location and weather conditions which influence on the radio propagation at VHF band. As far as AIS coastal stations owned by the State Hydrographic Service of Ukraine are installed on the navigational facilities, which have the most favourable location for radio equipment operation, they ensure the receiving range of 30-40 miles. Vessels’ visibility under clear conditions could come up to 200 miles.

How to authorize?

Access to authorized mode can be granted on formal inquiry that should be addressed to the State Hydrographic Service of Ukraine.

What can I do for improvement of this service?

Please, forward your comments and proposals by means of this form.






CARTOGRAPHIC PRODUCTS

The sea ports of Kerch, Sevastopol, Feodosiia, Yalta, Yevpatoriia are closed until the restoration of the constitutional order of Ukraine within the territory of the Autonomous Republic of Crimea and the city of Sevastopol that are temporarily occupied by the Russian Federation (in accordance with the Order of the Ministry of Infrastructure of Ukraine on June 16, 2014, No. 255).