At Right to the Keel' refers to the position of a ship's MAST%2C skeg%2C and abaft in relation to the keel. The term 'at right to the keel' means that the MAST%2C skeg%2C and abaft are all positioned directly beside the keel of the ship. The MAST is the vertical structure that supports the sails and rigging of the ship%2C while the skeg is a protective structure that extends downward from the hull of the ship to protect the propeller and rudder. Finally%2C abaft refers to the area behind the ship's stern or aft end. Therefore%2C the term 'at right to the keel' describes the position of these three structures in relation to the keel of the ship.