Rules of Department of Commerce, and supplemental regulations of War Department governing display of signals on, and operation of, all craft and accessories working on wrecks, engaged in dredging, surveying, or other work of improvement, and use and navigation of waters in vicinity, in all harbors, rivers, and inland waters of U.S., except Great Lakes and their connecting and tributary waters, Red River of the North, and rivers emptying into Gulf of Mexico and their tributaries.