Examples include quays, wharfs, jetties, piers, anchor buoys, and mooring buoys. The Marine Department operates and maintains 58 mooring buoys for seagoing vessels. Mooring causes damage which can be reduced by using mooring buoys. Plastic mooring buoys and plastic bottles are plentiful on the beaches of Palmyra. Both moored buoys and drifting buoys (drifting in the open ocean currents) are used. Some species also rest on man-made structures, like piers, jetties, buoys and oil platforms. This shark is often found around floating objects such as logs or tethered naval buoys. Non-breeding individuals may gather at marinas, wharves, or even navigational buoys. This system was adapted from existing buoys used on tuna fishing nets. CETO is a wave power technology that desalinates seawater using submerged buoys. All fairway buoys are lit and fitted with radar reflectors. It was accompanied by a by seaplane pier and three anchorage buoys. Data are collected at thousands of meteorological stations, buoys and ships around the globe. The tsunami damaged navigation buoys at Ventura. The sailing area is marked out by lines of small white buoys.