Section 165.823 - Allegheny River, Monongahela River, and Ohio River, Pittsburgh, Pennsylvania; Regulated Navigation Area(a)Location. The following is a regulated navigation area (RNA): The waters of the Allegheny, Monongahela, and Ohio Rivers between the Ninth Street Highway Bridge at mile marker (MM) 0.8 on the Allegheny River, Fort Pitt Highway Bridge at MM 0.22 on the Monongahela River, and West End-North Side Highway Bridge at MM 0.8 on the Ohio River.(b)Applicability. This section applies to any vessel operating within the RNA, including a naval or public vessel, except a vessel engaged in:(2) Servicing aids to navigation; or(3) Surveying, maintaining, or improving waters within the RNA.(c)Regulations.(1) No vessel shall loiter, anchor, stop, moor, remain or drift at any time more than 100 feet from any river bank within the RNA without permission of the Captain of the Port (COTP), or any Coast Guard commissioned, warrant, or petty officer who has been designated by the COTP to act on his or her behalf.(2) No vessel shall loiter, anchor, stop, moor, remain or drift in any manner as to impede safe passage of another vessel to any launching ramp, marina, or fleeting area.USCG-2019-0118, 85 FR 2307 , Jan. 15, 2020