Abstract: The present document describes a dock unit attachable to another dock unit with a fastener for forming a floating dock. The dock unit comprises a floating body having a mating surface and an attachment adapted to receive the fastener. Thereby attaching the floating body is able to be attached to the other dock unit. The dock unit further comprises a cover for covering the mating surface, the cover having a contact surface adapted to contact the fastener. In use, the contact surface is positioned proximate the attachment so that, when the attachment receives the fastener, the contact surface is contacted by the fastener, thereby limiting the movement of the cover with respect to the floating body.