Chart correction 46/23 — chart 18502
★18502 88Ed. 02/01/17 LAST NM 40/21 46/23 Relocate Buoy "9" from 46°54′47″N 124°09′54″W to 46°54′48″N 124°09′48″W (31/23 CG13)
Source: NGA U.S. Notice to Mariners · edition: 88Ed. 02/01/17
Reference information — always verify against official Notices to Mariners before navigation.