Product Details

The most popular Halcyon SMB type.

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
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 that wish to carry one color to mark position and one to mark emergencies.


Hot pink, Orange, Yellow

Inflation type

Closed Circuit, Oral Inflation with OPV


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