Halcyon Diver Alert Markers enhance diving safety by providing maximum visibility and redundant flotation. The
peace of mind that comes from proper preparation is second only to the practical support offered by Halcyon
Diver Alert Markers during a separation from the dive team or surface vessel. Halcyon Alert Markers are available
in yellow or orange for divers who wish to carry one color to mark position and another to designate emergency
Halcyon offers a variety of Lift Devices and Surface Markers, allowing divers to select the best option
for their particular environment. Divers in calm conditions and/or on shallow dives often choose a small
Halcyon surface marker so the boat can easily identify their position.
In rough or unpredictable seas
divers may carry a slightly larger inflatable, which increases visibility. Open bottom SMBs are very simple
designs with a low profile (because they do not need an OPV valve installed); however, these designs are
slightly more prone to tipping, which can induce a loss of gas while at the surface.
Closed-circuit bags eliminate the risk of gas loss at the surface and provide optional surface floatation
but must be filled with a low pressure inflator hose.