With the simple push of a button, boaters can safely adjust the position of their Masthead Anchor Light from the comfort of the helm. Ideal for powered vessels 39 and under (12-meters and under), the GS-950 is certified for USCG-required 3 nautical miles. The GS-950 is a fully electric unit with hidden wires inside the hardtop. This mount easily installs to the surface of the hardtop and fits all top thicknesses.