How to use a Delayed Surface Marker Buoy
1. Deploy the Buoy and Spool
Unclip the spool from your harness or BCD, remove the clip and secure it to a D-ring, then attach the spool to the DSMB.
2. Inflate the Delayed Surface Marker Buoy
Open the bottom of the marker buoy and hold it above your regulator exhaust valve, the diver can choose to add air orally or from a low-pressure hose until the buoy partially inflates and tugs upwards on your hands.
3. Unspool a Bit of Line
Allow the spool to unwind a few feet, and look over the spool to make sure the line is not entangled. Check one more time above you for other divers and obstructions to make sure the SMB has a clear path to the surface.
4. Release the Buoy
If the situation looks under control, allow the spool to unwind and the SMB to rise to the surface. If the spool starts to pull you to the surface, drop it.
5. Storage your Buoy
Keeping your SMB rolled up,then bungee cord and magic stick fix it when you finish diving, additional sturdy metal D ring to keep it attached to your BCD when not in use.