Section 110.231 - Ketchikan Harbor, Alaska, Large Passenger Vessel Anchorage(a)The anchorage grounds. Ketchikan Harbor, Alaska, Large Passenger Vessel Anchorage. The waters of Ketchikan Harbor, Ketchikan, Alaska, enclosed by the following boundary lines: A line from Thomas Basin Entrance Light "2" to East Channel Lighted Buoy "4A", to Pennock Island Reef Lighted Buoy "PR", to Wreck Buoy "WR6", then following a line bearing 064 degrees true to shore. This anchorage is effective 24 hours per day from 1 May through 30 September, annually.(b)The regulations.(1) When transiting through the anchorage, all vessels using propulsion machinery shall proceed across the anchorage by the most direct route and without unnecessary delay. Sudden course changes within the anchorage are prohibited.(2) No vessels, other than a large passenger vessel of over 1600 gross tons, (including ferries), may anchor within the anchorage without the express consent of the Captain of the Port, Southeast Alaska.CGD17-99-002, 64 FR 29558, June 2, 1999