Should Surface Marker Buoys be Mandatory?
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Surface Marker Buoy - Mandatory or Not
Lost Underwater - International Training - SDI, TDI, ERDI
Many divers wouldn't think of diving without carrying a delayed surface marker buoy (DSMB), and in some locations it's considered required safety
PADI® Delayed Surface Marker Buoy Course
Should DSMBs Be Mandatory Safety Equipment?
SCUBAPRO - MARKER BUOY
Should Surface Marker Buoys be Mandatory?
WHAT DIVERS NEED ON THE BOARD OR DAILY TRIP – Red Sea Diving RedSea
4ft Scuba Diving Surface Marker Buoy (SMB) w/49ft Finger Spool Alloy Spool
Surface Marker Buoy Use: Guide to Safe Scuba Diving in Curaçao