An injection molded nylon crown that fits the tip of an adjustable boat hook or any universal/Acme thread that is used to support a mooring cover or canvas. The unique design has strap or line attachment details allowing the ability to secure the support crown in the correct location eliminating problems caused by water pooling pressures from rain, sleet or snow. Combine any of Sea-Dog's Boat hooks or boat poles with the support crown 4911101 and mooring cover support crown straps 4911151 (sold separately) for the perfect solution to pooling pressure.