sea mark - aids pilotage by marking a maritime channel, hazard and administrative front yard to allow boats and ships to navigate safely. lifebuoy - the life saving buoy designed to exist as thrown to a human in the a body of water to provide buoyancy. Commonly has a copulative line letting the casualty to exist as pulled to the rescuer Submarine communication buoy - to be freed just in case of emergencies or even for communication Communication buoy for the bottom pressure detector, for tsunami detection. DAN buoy - has 2 meanings: the heavy maritime navigational aid providing the platform for light and radio beacons the lifebuoy by using the flags utilized in yachts and little pleasure craft Sonobuoy - used by anti-submarine warfare aircraft to detect submarines by SONAR Surface Marker Buoy - taken on dives by SCUBA divers to mark their position underwater Decompression buoy - deployed by submerged SCUBA divers to mark their position underwater whilst doing decompression stops shot buoy - used to mark dive web sites for the boat safety handle of SCUBA divers so that a divers could descend to the dive places supplementary well conditioned of moo visibility or even tidal currents and more safely launder decompression stops on their ascent mooring buoy - to keep 1 prevent of the mooring cable or even chain on the a water system's surface and so that ships or boats can tie in to it tripping buoy - to keep of these prevent of the tripping line on the water's surface thus that the stuck anchor can more well become freed upwind buoy - equipped to measure weather parameters like air temperature, barometric pressure, wind speed & counsel & to report these information via satellite link to meteorologic centres for utilise around prediction. Can be anchored or even allowed to drift in the open ocean currents. Position is estimated per satellite. profiling buoy - specialised model which adjusts its buoyancy & so that it may sink at a restricted rate to 2,000 metres beneath the surface when with measurements of sea temperatures and salinity. So when occasionally Ten times it comes back to the surface & transmits its information via satellite prior to sinking over again. ice marking buoy - buoys for marking ice holes within frozen streams, lakes, & wells throughout and streams, lakes, and wells throughout, and so that snowmobiles don't cause on top a holes.