Chart correction N36/20 — chart 17458

17458 2Ed. 9/23/16 LAST NM N31/20 N36/20 Add Depth 2 1/2 fathoms 51°56′22″N 128°16′03″W and extend depth contour (6-fathom) and blue tint S to enclose (11/18 Ottawa)

Source: NGA U.S. Notice to Mariners · edition: 2Ed. 9/23/16

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