Halcyons series of Diver Alert Markers provide maximum visibility and redundant flotation at the surface.

Open water divers should always carry a marker buoy they can send up in the event of separation from buddy, primary group, or boat
Available in four sizes:

Small Alert Marker: 3.3ft long, 6 lbs lift
Semi-Closed Alert Marker: 3.8ft long, 20 lbs lift
Big Alert Marker: 4.5ft long, 40 lbs lift
Super Big Alert Marker: 6ft long, 52 lbs lift

* Halcyon Diver Alert Markers (except semi-closed model) feature closed-circuit (one-way valve) construction
* Inflate at the surface to attract attention
* Inflate at depth to send up as a surface marker
* All markers are small enough when deflated to fit in a Halcyon thigh pocket or MC Storage Pak
* Big and Super Big Alert Markers both come with Coast Guard approved SOLAS reflective tape across the top for improved visibility.
* The Semi-Closed Alert Marker has a baffled open bottom for filling with a regulator?s second stage; all other Halcyon Divers Alert Markers feature closed-circuit (one-way valve) construction.

Our European customers have been requesting a safety-yellow variation of our Diver Alert Markers it is common to expect or require both yellow and orange markers when diving off of a charter in some countries. In response, Halcyon is now making the small closed-circuit DAM in florescent yellow.

In addition to the yellow 3.3ft dam, Halcyon is introducing a completely open circuit alert marker that will sell in a two-pack with one yellow and one orange marker.

The new markers are 4.5ft (1.37m) long, are an open-bottom design (not baffled, like the semi-closed DAM)