Haw. Rev. Stat. § 462A-18: Vessels required to take a pilot.

Every vessel, other than an exempt vessel, entering or departing from any port in or traversing the waters of the State designated as pilotage waters shall employ a pilot licensed under this chapter; provided that a vessel declared by the director of transportation to be in immediate danger of destruction or which poses an immediate hazard to public safety by its presence in the harbor may be moved without a pilot when a pilot is not immediately available.