Halcyon Big Closed-Circuit DAM | 18 kg/40 lb of Lift for Tech Divers

DAMs and Lift Bags

Big Closed-Circuit DAM (1.4 m/4.5 ft Tall and 18 kg/40 lb Lift)

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.

High-Visibility Surface Marker with Redundant Buoyancy

Whether separated from your team or signaling a surface vessel, this marker ensures you're seen and supported. Trusted by both technical and recreational divers, it's built with Halcyon’s proven durability and thoughtful design.

Big Closed-Circuit DAM

Specifications

Easily inflated at depth
Diver’s Alert Markers use an integrated over-pressure relief valve, allowing them to be deployed from depth
When deflated, all markers fit in a Halcyon thigh pocket or backplate MC Storage Pak
Big and Super Big Alert Markers are marked with Coast Guard-approved SOLAS reflective tape
Halcyon Diver Alert Markers (except semi-closed model) feature our No-Lock® connector for oral inflate or LP hose connection
Halcyon offers several Diver Alert Markers in your choice of yellow, shocking pink, or orange. These combinations support divers who wish to carry one color to mark their position and one to mark emergencies.

California Residents Only

Please click here for Proposition 65 Warning

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Super Slim DAM (1.8 m/6 ft Tall and 5.5 kg/12 lb Lift)

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Super Big Closed-Circuit DAM (1.8 m/6 ft Tall and 23.6 kg/52 lb Lift)

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DAMs and Lift Bags

Big Closed-Circuit DAM (1.4 m/4.5 ft Tall and 18 kg/40 lb Lift)

High-Visibility Surface Marker with Redundant Buoyancy

Big Closed-Circuit DAM

Specifications

Easily inflated at depth
Diver’s Alert Markers use an integrated over-pressure relief valve, allowing them to be deployed from depth
When deflated, all markers fit in a Halcyon thigh pocket or backplate MC Storage Pak
Big and Super Big Alert Markers are marked with Coast Guard-approved SOLAS reflective tape
Halcyon Diver Alert Markers (except semi-closed model) feature our No-Lock® connector for oral inflate or LP hose connection
Halcyon offers several Diver Alert Markers in your choice of yellow, shocking pink, or orange. These combinations support divers who wish to carry one color to mark their position and one to mark emergencies.

California Residents Only

Please click here for Proposition 65 Warning

Related products

Dive Essentials

Defender™ Safety Spool

Dive Essentials

3.3’ Closed-Circuit DAM (1 m/3.3 ft Tall and 2.7 kg/6 lb Lift)

Dive Essentials

Super Slim DAM (1.8 m/6 ft Tall and 5.5 kg/12 lb Lift)

Dive Essentials

Super Big Closed-Circuit DAM (1.8 m/6 ft Tall and 23.6 kg/52 lb Lift)

Dive Essentials

Pathfinder™ Primary Reel

Dive Essentials

Defender Pro™ Reel

Big Closed-Circuit DAM (1.4 m/4.5 ft Tall and 18 kg/40 lb Lift)

Big Closed-Circuit DAM (1.4 m/4.5 ft Tall and 18 kg/40 lb Lift)

Specifications

Related products

Big Closed-Circuit DAM (1.4 m/4.5 ft Tall and 18 kg/40 lb Lift)

Big Closed-Circuit DAM (1.4 m/4.5 ft Tall and 18 kg/40 lb Lift)

Specifications

Related products

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