18 GCA § 56403.14: Mandatory use of Harbor Pilot.

Every vessel involved in trade or commerce, other than an exempt vessel, entering, departing from or traversing the waters of Apra Harbor shall employ a harbor pilot. However, a vessel declared by the Harbor Master or the Captain of the Port to be in immediate danger of destruction or which poses an immediate hazard to public safety by its presence in any harbor may be moved without a pilot when a pilot is not immediately available.