Abstract: A device for securing a forked boom to a mast and includes clamping elements, which engage the mast and are provided on a retaining member which at least partly surrounds the mast. The retaining member is annular and is larger in diameter than the mast. At least one wedge-shaped clamping element is slidably mounted in the annular space between the retaining member and the mast.

Abstract: The sailboard has an opening, which contains a tongue of a mast base, which is articulatedly connected to the mast, so that the mast base is detachably connected to the sailboard. One side face of the opening is provided with a detent cam, which is adapted to be depressed against spring force and has an oblique or curved camming surface, which is adapted to snap behind the step or stop as the tongue is inserted into the opening.

Abstract: A mast-connecting universal joint is provided, which is connected at one end to the mast and is permanently fixed thereto or can be only arbitrarily separated therefrom, and which is connected at its other end to a supporting member, which is biased by a resilient element and in position for use is positively held in a slide, which is longitudinally slidably guided and adapted to be resilient locked in a groove of the sailboard. The resilient element constitutes a return spring for the supporting member when the mast is in any position of use, and a return spring for moving the longitudinally slidable slide to a position in which the slide is releasably locked.