Abstract
The Skagerack, the Kattegatt, the Danish Sounds and the Baltic, all together here called the Trans-Baltic, are treated as a one-dimensional channel with homogenous water. Water heights and velocities are computed from the linear hydrodynamical equations, including terms of acceleration, wind stress, air pressure and friction. It is made numerically with help of the electronic computor BESK. The computations are mainly concentrated to a case 5/12–12/12 1932. The same treatment is also made for a closed basin consisting of the Baltic proper + the Gulf of Finland, altogether here called the Eastsea.