Surface Marker Buoys are safety devices that is a must for all safety conscious divers, allowing a diver to mark their location when making safety stops, completing mandatory decompression-stops, and signaling the boat if they surface a distance. The OMS Surface Marker Buoy 6' (183 cm) has an open bottom and is a high visibility signaling device that is easy to use and easy to deploy. Designed with an open bottom, the OMS Surface Marker Buoy (SMB) can be easily inflated using the octopus second stage regulator or other methods. It is ideal for divers performing drift or decompression dives and is an indispensable and essential safety equipment for all serious divers. The slim design SMB is made from bright orange laminate fabric with reflective tape at top for easy identification in low light conditions. The fabric seams are taped and sewn for added strength and durability. The SMB comes equipped with a pull dump overpressure relief valve (OPV) with pull cord and an alternate inflation oral/power inflator valve. The open bottom /one way valve design prevents gas venting upon reaching the surface. The OMS SMB provides 25 lbs. (11.34 kg) of lift and is equipped with 1" (25 mm) webbing and stainless steel D-ring attached to bottom for rigging.