Self inflating Man Overboard Dan Buoy. Just throw it in the direction of the person in the water. In seven seconds, the SOS Marine dan buoy self inflates. It becomes a six foot tall floating inflated spar buoy with an eight foot streamer from its top, made in super high visibility fluorescent green material. It is ballasted to help it maintain as vertical an attitude as the wind and sea conditions will allow. Night time visibility is enhanced by the automatically activated SOLAS strobe light and lengths of SOLAS light reflective tape. A whistle helps the man overboard alert you to his position in heavy fog, and the device incorporates hand holds so the man in the water can hang on to the highly visible buoy. 8 x 3 x 11