Virtual AIS (Automatic Identification System) buoys are different from traditional buoys as the buoy does not exist physically in the water, but is only visible on the ships' navigation equipment.

However, the routes will still be defined with traditional physical aids to navigation optimized to the new routes. The new shipping routes aim to enhance the safety of navigation in the main traffic routes to and from the Baltic Sea.

The current routeing systems in the waters were firstly established based on the mined swept routes established after World War II. The waters were declared free of mines in 1975, but the routes have still been used to guide the shipping traffic safely through the Danish waters. Now the routes are adjusted according to the natural sailing patterns, so that they guide and separate the shipping traffic better.

The routes have been developed in close cooperation with the Danish Geodata Agency, the Swedish Transport Agency and the Swedish Mari-time Administration.

Andreas Nordseth, Director-General of the Danish Maritime Authority, stated on the occasion:

With up to 70,000 ships annually through the Kattegat, it is essential to keep in mind the safety of navigation. Shipping in these waters is quite intensive, especially around the Skaw, and both in Denmark and abroad we have good experiences in enhancing the safety of navigation with routeing systems. At the same time, we introduce digital tools, as the routes will be marked with virtual buoys, which also is considered to en-hance the safety