Halcyon big closed-circuit diver alert marker (dam) – 4.5 ft surface marker buoy

Description

The Halcyon Big Closed-Circuit Diver Alert Marker (DAM) is an essential piece of safety equipment designed to maximize diver visibility and provide dependable emergency flotation during ascents, decompression stops, and surface signaling. Standing 1.4 meters (4.5 feet) tall and providing 18 kg (40 lb) of lift, this large-capacity closed-circuit marker offers outstanding visibility in rough seas and demanding dive conditions.

Engineered for both recreational and technical divers, the Big Closed-Circuit DAM features a closed-bottom design that allows it to remain fully inflated while providing stable buoyancy at the surface. The integrated over-pressure relief valve allows safe deployment from depth by automatically venting expanding gas during ascent, while the bottom dump valve enables controlled deflation after use.

Halcyon's exclusive No-Lock® connector allows divers to inflate the marker orally or directly from a low-pressure inflator hose, providing multiple deployment options underwater. Once inflated, the marker remains highly visible thanks to its tall profile and Coast Guard-approved SOLAS reflective tape, helping surface support crews quickly locate divers in low-light conditions or rough seas.

When deflated, the marker folds compactly to fit inside a Halcyon thigh pocket or MC Storage Pak, ensuring it is always available without adding unnecessary bulk to your dive equipment.

Available in Orange, Yellow, and Shocking Pink, Halcyon Diver Alert Markers allow divers to carry different colors for routine surface location and emergency signaling, creating a clear visual communication system for dive teams and support vessels.

Features:

• Large closed-circuit diver alert marker
• 1.4 m (4.5 ft) tall for maximum surface visibility
• Provides 18 kg (40 lb) of emergency lift
• Easily deployed from depth
• Integrated over-pressure relief valve
• Bottom dump valve for controlled venting
• Halcyon No-Lock® LP/oral inflation connector
• Oral or low-pressure inflator hose compatible
• Coast Guard-approved SOLAS reflective tape
• Compact storage in Halcyon thigh pockets or MC Storage Pak
• Available in Orange, Yellow, and Shocking Pink
• Built for recreational and technical diving
• Genuine Halcyon diving equipment

Specifications:

Product Type

Closed-Circuit Diver Alert Marker (Surface Marker Buoy)

Height

1.4 m (4.5 ft)

Lift Capacity

18 kg (40 lb)

Inflation

• Oral Inflation
• Low-Pressure Inflator Hose
• Halcyon No-Lock® Connector

Pressure Relief

Integrated Over-Pressure Relief Valve

Deflation

Bottom Dump Valve

Reflective Material

Coast Guard-Approved SOLAS Reflective Tape

Storage Compatibility

• Halcyon Thigh Pocket
• Halcyon MC Storage Pak

Available Colors

• Orange
• Yellow
• Shocking Pink

Application

Surface Signaling, Safety Stops, Decompression Diving, Emergency Flotation

Brand

Halcyon

Included Components:

• Halcyon Big Closed-Circuit Diver Alert Marker

Low-pressure inflator hose and spool sold separately.

Ideal For:

• Recreational scuba diving
• Technical diving
• Cave diving
• Wreck diving
• Decompression diving
• Offshore diving
• Drift diving
• Boat diving
• Emergency signaling
• Surface support operations