Chart correction N52/21 — chart 18467
18467 2Ed. 05/18/07 LAST NM N33/21 N52/21 Add Depth 1.8 meters 48°38′44.0″N 123°20′16.4″W and extend depth contour (2-meter) SW to enclose Depth 1.3 meters 48°38′44.7″N 123°20′30.6″W and extend depth contour (2-meter) N to enclose Depth 1 meter enclosed by depth contour (2-meter) centered 48°38′18.4″N 123°19′14.1″W (Plan Tsehum Harbour) Add Depth 0.6 meter 48°40′27.8″N 123°24′47.1″W (10/21 Ottawa)
Source: NGA U.S. Notice to Mariners · edition: 2Ed. 05/18/07
Reference information — always verify against official Notices to Mariners before navigation.