Chart correction N51/22 — chart 22426
22426 1Ed. 09/14/13 LAST NM N49/20 N51/22 Delete Depth 17.4 meters 50°45′00″S 74°32′40″W Depth 7.9 meters 50°39′47″S 74°33′36″W Add Depth 2.2 meters 50°45′01″S 74°32′34″W and extend blue tint and depth contour (5-meter) SW to enclose Depth 6.2 meters 50°40′06″S 74°33′20″W and extend blue tint and depth contour (10-meter) S to enclose Depth 5.2 meters 50°39′47″S 74°33′39″W and extend blue tint and depth contour (10-meter) W to enclose Depth 4 meters, blue tint, and enclosing depth contour (5-meter) centered 50°39′45″S 74°34′07″W Depth 8.7 meters, blue tint, and enclosing depth contour (10-meter) centered 50°39′01″S 74°35′30″W (11(93)22 Valparaiso)
Source: NGA U.S. Notice to Mariners · edition: 1Ed. 09/14/13
Reference information — always verify against official Notices to Mariners before navigation.