Chart correction N43/21 — chart 17415

17415 1Ed. 10/23/87 LAST NM N28/21 N43/21 Delete Depth 10 fathoms 53°46.7′N 133°07.9′W Add Depth 1 3/4 fathoms, blue tint, and enclosing depth contour (5-fathom) centered 53°46.8′N 133°07.9′W (7/21 Ottawa) ★18622 56Ed. 4/16 LAST NM 11/21 43/21 Delete Buoy “9” 40°45′26.6″N 124°13′25.2″W (37/21 CG11) ★18623 12Ed. 1/12 LAST NM 3/18 43/21 Relocate Buoy “40” from 40°26′47.3″N 124°29′58.7″W to 40°26′49.1″N 124°29′56.8″W (37/21 CG11) ★18749 44Ed. 10/15 LAST NM 51/18 43/21 Substitute Depth 4 feet for depth 10 feet 33°45′38.6″N 118°12′04.9″W and extend depth contour (6-foot) SE to enclose (NOS) ★18751 48Ed. 7/16 LAST NM 51/18 43/21 Substitute Depth 4 feet for depth 10 feet 33°45′38.6″N 118°12′04.9″W and extend depth contour (6-foot) SE to enclose (NOS)

Source: NGA U.S. Notice to Mariners · edition: 1Ed. 10/23/87

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