Chart correction N29/21 — chart 17439
17439 2Ed. 10/7/16 LAST NM N49/17 N29/21 Add Depth 13 meters ODAS [L25] 54°15′48.0″N 130°46′45.0″W Depth 0.7 meter 54°08′31.7″N 130°49′27.1″W and extend depth contour (2-meter) S to enclose Depth 2.9 meters 54°06′29.6″N 130°43′08.5″W and extend depth contour (5-meter) and blue tint S to enclose (3, 10/20 Ottawa)
Source: NGA U.S. Notice to Mariners · edition: 2Ed. 10/7/16
Reference information — always verify against official Notices to Mariners before navigation.