Chart correction N31/21 — chart 17498

17498 1Ed. 12/25/98 LAST NM N17/20 N31/21 Add Buoy Y, pillar, Fl(5) Y 20s with legend “ODAS” [Q58] 49°18′06″N 123°21′24″W (1/20 Ottawa)

Source: NGA U.S. Notice to Mariners · edition: 1Ed. 12/25/98

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