Abstract: The disclosure generally relates to an apparatus for securing and adjusting a watch strap. In an exemplary embodiment, the disclosure relates to a wrist watch having a watch strap closing system that allows a watch strap with saw teeth to be locked and secured in place by a locking mechanism having complimentary saw teeth. The watch strap can move in one direction in order to tighten the watch strap around the user's wrist, but is prevented from moving in an opposite direction. To release or loosen the watch strap, the user can apply pressure to disengage the locking mechanism.

Abstract: The disclosure generally relates to an apparatus for securing and adjusting a watch strap. In an exemplary embodiment, the disclosure relates to a wrist watch having a watch strap closing system that allows a watch strap with saw teeth to be locked and secured in place by a locking mechanism having complimentary saw teeth. The watch strap can move in one direction in order to tighten the watch strap around the user's wrist, but is prevented from moving in an opposite direction. To release or loosen the watch strap, the user can apply pressure to disengage the locking mechanism.

Abstract: A global positioning system (GPS) receiver may be integrated with a tide display device. The GPS receiver receives satellite signals and determines the precise time and geodetic position by trilateration. The precise time and geodetic position is used by the tide display device to determine the appropriate tide information to display. The tide display device displays the tide information to a surfer on a graph display with the ordinate axis representing tide height and the abscissa axis representing time.