1 INTRODUCTION
Safety of navigation on the approaches to the seaports
of the Republic of Poland can be endangered by
increased movement of big ships, including Maersk’s
container vessels and especially liquid natural gas
(LNG) delivering vessels. Gdańsk and Gdynia,
Poland’s main seaports are located in Zatoka Gdańska
in the east of Polish seaside. In the west is located
seaport in Szczecin and new build gas port in
Świnoujście. Gdańsk and Gdynia take most of the
Polish sea trade, having reasonable part in containers
transportation on the line to and from China.