Diving Articles Scuba Tech Tips: Surface Marker Buoys (SMB) – S02E14 Rouge Diver Mar 9, 2019 23 Know the difference between a SMB and a Delay SMB? Still diving in Palau, Alec explains both types of Surface Marker Buoy's with a demonstration of how to deploy at depth. Enjoy his last Scuba Tech Tip filmed on the live-aboard MV… Read More...