Halcyon Divers Alert Marker Big Open Bottom 4.5′



Halcyon Divers Alert Marker Big Open Bottom 4.5′

Halcyon Divers Alert Marker Big Open Bottom 4.5′ Surface Marker Buoy  is one of our most popular surface marker options for new open water divers through to experienced technical divers.

The Halcyon Divers Alert Marker Open Bottom surface marker is available in yellow or orange and stands 4.5′ high when fully inflated in the water.

The Open Bottom DAM works in conjunction with a Halcyon Defender spool as a delayed surface marker to be deployed easily from depth giving the diver a reference line to the surface and also to communicate their position if drifting in a current where the dive boat or surface support can keep an eye for the diver.

Generally speaking yellow is your every day colour, orange is an emergency colour and we now have this amazing open bottom SMB in PINK!

Key Features:

200 denier nylon
Lifetime Warranty on welded seams
Closed-circuit, semi-closed, and open-bottom designs
Patented No-Lock® connector for closed-circuit devices; oral inflate or LP hose connection

Halcyon Diver Alert Markers provide maximum visibility and redundant flotation to support diving safety and peace of mind. Marker buoys are essential safety equipment in the event of separation from the dive team or surface vessel.

The Halcyon Open DAM is easily inflated at depth from exhaled regulator exhaust bubbles or in warm water divers have the option of filling the bag off of a second stage regulator when they purge the reg.

Diver Alert Markers use an integrated pressure-relief valve, allowing them to be deployed from depth.

The Halcyon Oral inflate marker does not use a pressure-relief valve; it is only suitable for surface deployment.

The Halcyon OC Divers Alert marker when deflated, fits in a Halcyon thigh pocket or backplate Storage Pak as well as many other brands of drysuit or wetsuit pockets.

Semi-closed Alert Markers have a baffled bottom for filling with a regulator’s second stage
Halcyon Diver Alert Markers (except semi-closed model) feature our No-Lock® (one-way valve) construction for oral inflate or LP hose connection.

Halcyon offers several Diver Alert Markers in your choice of pink, yellow or orange. These combinations support divers that wish to carry one color to mark position and one to mark emergencies.

The Open Bottom DAM has no OPV and no oral or power inflation mechanism. The DAM is filled with the second stage from the open bottom of the marker body.


Pink, Yellow or Orange

Buy Halcyon Gear Online in Canada from Dan’s Dive Shop, a top stocking North American Dealer with Free Shipping.

Additional information

Weight 1 kg
Dimensions 21.5 × 15 × 10 cm

Orange, Pink, Yellow


There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

You may also like…