The AmScuD Sausage Alert Marker 3,7 Feet / 1,1 Meter Manual 995467 is a surface signaling device with its fluorescent orange coloring. A unique feature of the AmScuD Sausage Alert Marker 3,7 Feet / 1,1 Meter Manual 995467 This way a diver can signal he will soon be ready for pick-up, without going to the surface immediately. There is also an oral inflate valve for surface use. The AmScuD Surface Marker Buoy (SMB) AmScuD Sausage Alert Marker 3,7 Feet / 1,1 Meter Manual 995467. Tube are made from Durable Cordura Material have a webbing loop at base for line tie-off.