Halcyon Diver Alert Markers are essential safety gear, providing reliable flotation and visibility during open-water ascents or surface signaling. The Big Closed-Circuit DAM provides 18 kg/40 lb of redundant lift to support diver safety in emergencies.

At 1.4 m/4.5 ft tall, this closed-circuit surface marker remains upright and visible even in challenging conditions. A built-in over-pressure valve and bottom dump allow controlled deployment and venting at the surface.