Wash. Rev. Code § 88.16.180 : — NAVIGATION AND HARBOR IMPROVEMENTSPILOTAGE ACT — Oil tankers-State licensed pilot required TEXT PDF Notwithstanding the provisions of RCW 88.16.070, any registered oil tanker of five thousand gross tons or greater, shall be required: (1) To take a Washington state licensed pilot while navigating Puget Sound and adjacent waters and shall be liable for and pay pilotage rates pursuant to RCW 88.16.035; and (2) To take a licensed pilot while navigating the Columbia river. RCW 88.16.180 1991 c 200 § 602; 1983 c 3 § 231; 1975 1st ex.s. c 125 § 2. Effective dates-1991 c 200: See RCW 90.56.901. Severability-1975 1st ex.s. c 125: See notes following RCW 88.16.170.