A surface marker buoy (SMB) is an essential piece of equipment for scuba divers, as it helps to signal their location to boat traffic and support teams on the surface. Here’s a step-by-step guide on how to deploy an SMB and organize an ascent from a dive: 1. Inflate the SMB using your regulator or an inflator hose. Make sure it is inflated before releasing it. 2. Hold the SMB at arm’s length, and let it go when you’re ready to deploy it. Make sure the line attached to the SMB is slack, so it doe