Chart correction 52/22 — chart 18531

★18531 24Ed. 12/01/17 LAST NM 34/21 52/22 (Upper Panel) Add Buoy "54" R, Fl R 2.5s 45°33′19.0″N 122°20′16.2″W Buoy "56" R, Fl R 6s 45°32′57.0″N 122°19′29.0″W (40/22 CG13)

Source: NGA U.S. Notice to Mariners · edition: 24Ed. 12/01/17

Reference information — always verify against official Notices to Mariners before navigation.