A delayed surface marking device (DSMB), or delayed surface marker buoy, is an inflatable tube used by divers to signal their location from underwater to the surface. Key uses include alerting boat traffic to divers' presence, providing a visual reference during ascent and safety stops, especially in currents, and helping divers maintain depth during decompression stops. A DSMB is a crucial safety tool for divers, though it requires training to deploy correctly to avoid entanglement.
Do you have a diver on your gift list keep them safe
