Whether you need to dive for boat maintenance (e.g., unfoul the prop, clean the hull, etc.) or for recreation, the Air Line has a model to suit your application. The Air Line makes gas or electric models using the highest quality components that enable 1-4 divers to dive to depths ranging up to 85 feet. Takes less space and weight than scuba gear/tanks, and eliminates the hassles of transporting filling, and wearing heavy, bulky scuba tanks. Check out all of our high quality systems at www.airlinebyjsink.com.