Home | Marine Aids to Navigation | Navigation Buoys Spar Buoys 3 mSubmersible 2-3 m Focal Plane 1 m3 Volume Spar buoys are suited for marking breaking seas. These buoys are designed to have the minimum area exposed to the swell and also a low buoyancy reserve so that they can sink in a wave with a minimum load to the mooring system. Its torpedo shape helps maintain a minimum resistance to the power of a wave. Its reduced flotation reserve requires detailed knowledge of local conditions such as depth, tidal variation and waves for an accurate calculation of the mooring system by Almarin technicians. Request moreinformation about Spar Buoys