In mid-May Ross Laboratories, Inc., Seattle, Wash., delivered the first of two survey boats to the U.S. Army Corps of Engineers - Rock Island District. The Ross "Mini-Sweep" is a small boat multi-channel survey system, designed for inland rivers and shallow water surveying. surveyor who worked for the RI District who recently passed away. The "Mini-Sweep" is ideally suited for installation on small trailerable vessels. The "turn-key" system for Rock Island District included a custom designed 35 ft. twin-hull workboat from SeaArk Marine, Inc. of Monticello, Ark. Two 20-ft. booms mounted on either side of the vessel provide a 50-ft. overall sweep width. The booms are stored in recessed areas in the hull, leaving the deck clear at all times.