Halcyon Super Big Closed-Circuit SMB – 6 ft / 52 lb Lift

Halcyon Super Big Closed-Circuit SMB – 6 ft / 52 lb Lift

The Halcyon Super Big Closed-Circuit Diver's Alert Marker (DAM) is a high-visibility surface marker buoy designed for technical diving, recreational scuba diving, and public safety diving operations. Standing 6 feet (1.8 meters) tall when fully inflated, this closed-circuit SMB helps divers remain visible to surface vessels while providing up to 52 pounds (23.6 kg) of positive buoyancy.

Constructed from durable 200-denier nylon with radio-frequency welded seams, the Halcyon Super Big DAM is designed for dependable underwater deployment and repeated use in demanding diving environments.

Unlike an open-bottom surface marker buoy, the closed-circuit design helps retain inflation gas when the marker reaches the surface. Its integrated over-pressure relief valve allows expanding gas to vent during ascent.

Features & Benefits

• 6 ft (1.8 m) tall – Extended height improves surface visibility to boats, dive teams, and surface support personnel.

• 52 lb (23.6 kg) lift capacity – Provides substantial positive buoyancy for surface marking and suitable light-duty support applications.

• Closed-circuit design – Helps retain inflation gas and maintain buoyancy at the surface.

• 200-denier nylon construction – Durable material designed for scuba diving environments.

• Radio-frequency welded seams – Strong, sealed construction for dependable performance.

• Integrated over-pressure relief valve (OPV) – Releases expanding gas during ascent to help prevent overinflation.

• Halcyon No-Lock® inflation connector – Supports oral inflation or connection to a compatible low-pressure inflator hose.

• SOLAS reflective tape – US Coast Guard-approved reflective material enhances visibility when illuminated.

• Compact storage – Deflates for storage in a Halcyon thigh pocket or backplate-mounted storage pack.

Applications

The Halcyon Super Big Closed-Circuit SMB is suitable for:

• Technical diving – Surface signaling during decompression stops and controlled ascents.

• Recreational scuba diving – Marking a diver's position for the surface vessel.

• Public safety diving – Surface location marking during dive team operations.

• Search and recovery diving – Marking underwater search locations and providing limited buoyancy support within its rated capacity.

• Wreck and cave diving – Carrying a high-visibility surface marker for use during open-water portions of the dive.

Product Specifications

• Manufacturer: Halcyon Dive Systems

• Model: Super Big Closed-Circuit DAM

• Type: Closed-Circuit Surface Marker Buoy / Diver's Alert Marker

• Height: 6 ft (1.8 m)

• Lift Capacity: 52 lb (23.6 kg)

• Material: 200-denier nylon

• Construction: Radio-frequency welded seams

• Inflation: Oral inflation or compatible LP inflator hose

• Pressure Relief: Integrated over-pressure relief valve

• Visibility: USCG-approved SOLAS reflective tape

• Storage: Compatible with Halcyon thigh pockets and backplate MC Storage Pak

Designed for Visibility and Reliable Surface Signaling

The Halcyon Super Big Closed-Circuit DAM combines exceptional surface visibility with the durability and inflation features needed by demanding scuba divers. Its 6-foot height, reflective markings, and closed-circuit design make it a versatile surface signaling tool for recreational, technical, and public safety diving.

Available from US Water Rescue, your source for Halcyon diving equipment, technical scuba accessories, public safety diving gear, and underwater search-and-recovery equipment.