SEMI-SUBMERSIBLE TANKER WITH DIRECTIONAL ICE CUTTERS

摘要

12918:MRSAbstract of the DisclosureA tanker having a submersible hull has a mastextending above the hull supporting a bridge section.The base of the mast is journaled in the hull for rotationabout a vertical axis. The bridge section is rotatablysupported on the mast. Drive means rotates the mastrelative to the hull and the bridge section such that thehull and bridge section remain aligned while the angularposition of the mast is changed. Rotary ice cutters arepositioned along one side of the mast and are positionedrelative to the surrounding ice by rotation of the mast soas to be aligned with the direction in which the iceencroaches on the mast.