Abstract: A board for water or snow activity includes a planar body having an edge joining vertices of the planar body, and a rail member defined by one or more flexible strips that continuously engage an edge portion of the board, adjacent to the vertices. A protective rail for protecting a water or snow activity board includes elongated flexible strips bent around an edge portion of the board, adjacent a vertex of the board, continuously engaging an edge portion of the board at the vertex. A method for attaching a protective rail to a water sport or snow sport activity board includes engaging an edge of the sports board with flexible protective strips and bending the strips around a vertex of the board, to continuously engage an edge portion of the board, adjacent the vertex of the board.

Abstract: A trimming gear on the mast top of a windsurfing rig having an adjusting element that can be connected to the sail top and fixed relative to the mast is arranged on the mast top. The adjusting element is actuated by a reducing gear and can be displaced in the longitudinal direction of the mast. Since the adjusting element is actuated by a reducing gear, it is possible to precisely adjust or trim the sail top with a relatively low expenditure of force, namely also in the tensioned state.

Abstract: A mast footing having a tensioning device for the leading edge with the components which provide for a reduction of force being attached to the mast footing such that they may be detached. When the sail has been correctly trimmed, i.e., with the leading edge tensioned, the device is removed from the arrangement. Then, only a hook-shaped device of short length is attached between a loop at the neck of the sail and a hook at the mast footing, which device preferably has a constant length or, at most, may be fine-tuned within a range of a few centimeters.