Chart correction N50/21 — chart 14213
14213 3Ed. 03/15/19 LAST NM N20/21 N50/21 Substitute Depth 11 meters for depth 11.5 meters 46°35′41.3″N 72°00′07.4″W Depth 8.2 meters for depth 8.7 meters 46°32′42.3″N 72°09′46.8″W Depth 6.9 meters for depth 7.2 meters 46°34′58.5″N 72°00′49.8″W (10/21 Ottawa)
Source: NGA U.S. Notice to Mariners · edition: 3Ed. 03/15/19
Reference information — always verify against official Notices to Mariners before navigation.