The OMS Dye marker is packaged in a water proof container rated to 330' FSW, provides a highly visible fluorescent, environmentallyfriendly "dye slick" that lasts for 30 minutes and enables aircraft to quickly locate the lost diver. This "slick" can be seen for amile or more. Current, wind and wave action will affect the shape and duration of the pattern. Red Dye Marker meets MILSPEC: MIL-S-17890D.