The DiveAlert SMB (surface marker buoy) features Closed-Circuit (one-way valve) construction, which prevents air spill at the surface. Inflate on the surface to attract visual attention or redundant flotation. Inflate at depth to send up as a surface marker.

Solas reflective tape (Coast Guard approved) across the top of SMB creates better visibility day and night. An Over-Pressure Valve (OPV) prevents bursting and easy air dumping. 65 inches long x 8 inches wide = approximately 40 lbs. of lift. Nylon strap handle on the top allows for easy attachment of a light or slate. 400 Denier polyurethane coated nylon material.