Can you use an SMB as a DSMB?
When should I deploy Dsmb?
Most recreational divers deploy it from their safety stop. We recommend you deploy your SMB before you start your ascent. This means you’re doing it from a deeper point which makes it easier to control your buoyancy, plus you don’t have to get as much air into the SMB.
What does a yellow DSMB mean?
YELLOW. Yellow SMBs are for Emergencies in some circles but simple Location Markers elsewhere, you will often see EMERGENCY written down the length of a yellow dSMB and are used by advanced divers that can’t ascend to the surface but need help or equipment from the surface without surfacing.