Some problems of berthing of ships with non-conventional propulsions

The berthing manoeuvre of ship is the last stage of navigation process. The safety of berthing depends on velocity due impact the quay. In case of ships with non-conventional propulsion (mainly two stern screws and few thrust propellers) the berthing manoeuvres are different then other ships. The paper presents an analysis the kind of ships power and their manoeuvrability features in aspect of safety berthing.