Section 45.185 - Tow limitations(a) Barges must not be manned.(b) No more than a total of three barges per tow may operate on the Milwaukee, St. Joseph, and Muskegon routes. A mixed tow of load-lined and exempted barges is still limited to three barges on those routes.(c) Tows must not be more than 5 nautical miles from shore.USCG-1998-4623, 67 FR 19690 , Apr. 23, 2002, as amended at 75 FR 70604 , Nov. 18, 2010