The invention relates to a mechanism that attaches and releases a boat or personal watercraft or the like to a trailer or lift or the like and includes a trigger which can move between a secured and released condition by means of contact with the boat or manually and which is biased by an energy storage device. Said trigger in turn may restrict or release a securing member or members which releases or secures a boat's eyehook. Said securing member may be biased by a primary energy device that may be moved to a locked or released condition as desired to attach the boat to, or release the boat from, the trailer.