Abstract: Method and device for heat treatment of a disc, whereby the disc (1) is placed on a carrier (14) after which the disc is irradiated. During the radiation the carrier is kept on a desired temperature. The desired temperature of the carrier is about the temperature of the disc prior to placement on the carrier. The disc comprises two disc elements and an adhesive layer between the disc elements, whereby the adhesive layer is cured by the irradiation with ultraviolet light.

Abstract: A portable navigational aid or device for use in a user-sailboat or similar vessel, where the user-sailboat and another approaching boat are traveling along courses which intersect, to indicate readily whether the user-sailboat should have the right-of-way considering the direction of the wind, the angles of approach of the two boats and the local governing rules regarding the right-of-way. The device includes a disc-shaped member which is held on board the user's boat so that an arrow on the disc-shaped member points in the direction of the wind. A marked pivoted indicator dial having a user-boat symbol is pivoted with the disc-shaped member and is oriented such that the user-boat symbol coincides with the direction of travel of the user's boat.