Arrangement for amphibious tracked vehicle

An arrangement for facilitating amphibious operation of a tracked vehicle, said tracked vehicle comprising one or more vehicle bodies and at least one track assembly pair per vehicle body, said track assembly pair being connected to the vehicle body, the track assembly pair comprising two track assemblies for driving the vehicle, each track assembly comprising a drive means driven endless track arranged to run over a set of wheels of the track assembly and, in connection to amphibious operation, being configured to operate under the water surface by rotating in the water providing a flow of water so as to provide a swimming operation of the vehicle, characterized in that said arrangement comprises a gas provision device configured to, in connection to swimming operation, introduce a gaseous medium into the flow of water at the upper side of the track of the respective track assembly so as to reduce the amount of water in connection to said upper side.