2 Norwegian vessels, NORBAR and COMABAR are also equipped with tanks in the holds. They have tanks for liquid and dry-powder. The hatch-covers are permanently closed, haven't been opened for years. All loading and discharging are carried out through manifolds on the side of hatches. Like RITSKE they are sailing between oilbases, mainly in Norway, but sometimes also Scotland and Denmark. It is not cement they are carrying as dry-powder, but baryte, which are used on the oilfields.