Chart correction N47/20 — chart 18436
18436 2Ed. 11/16/12 LAST NM N36/20 N47/20 Relocate Anchor berth “L” from 49°17′54.5″N 122°56′06.8″W to 49°17′59.0″N 122°56′06.0″W Anchor berth “K” from 49°17′51.1″N 122°56′51.9″W to 49°18′03.0″N 122°56′41.0″W (7/20 Ottawa)
Source: NGA U.S. Notice to Mariners · edition: 2Ed. 11/16/12
Reference information — always verify against official Notices to Mariners before navigation.