Surface Marker Buoy Workshop
If you are interested in the PADI Surface Marker Buoy Diver Specialty or have completed the specialty program already but feel like your skills could use some updating, then this workshop is for you.
Delayed Surface Marker Buoys (DSMBs) are long inflatable tubes that divers launch from underwater or at the surface to mark their position on the water's surface. These devices help communicate with people above, so every dive guide and instructor around will carry one or two of these during a dive as they can be used in case there is an emergency.
Every diver should also carry one in case they become separated during a dive, which however unlikely, does happen from time to time. It's usually deployed from around 5-10 meters underwater, but can also be attached to the surface or bottom of water depending on your dive plan.