RECOMMENDED TWO-WAY ROUTES
Recommended two way routes have been established including deep-water routes for vessels in the approaches to Portland Harbor and Casco Bay, through Hussey Sound to Cousins Island and through Broad Sound to Harpswell, Maine. While not mandatory, deep draft commercial vessels (including tugs and barges) are requested to follow the designated routes at the master's direction. Other vessels, while not excluded from these routes, should exercise caution in and around these areas and monitor VHF Channel 16 or 13 for information concerning deep draft commercial vessels (including tugs and barges) transiting these routes. See U.S. Coast Pilot Volume 1, Chapter 8.