Chart correction N27/21 — chart 37231
37231 19Ed. 11/12/11 LAST NM N26/21 N27/21 Delete Depth 8.4 meters 53°59′39″N 8°24′28″E Substitute Depth 10.7 meters for 14.1 meters 53°59′29″N 8°24′48″E Add Depth 8.5 meters 53°59′34″N 8°24′40″E Depth 9.2 meters 53°59′37″N 8°24′11″E and extend depth contour (10-meter) and blue tint SW to enclose above depths (2) Depth 8.4 meters 53°59′32″N 8°25′15″E and extend depth contour (10-meter) and blue tint S to enclose (22(1220)21 Hamburg; DEU CH 44)
Source: NGA U.S. Notice to Mariners · edition: 19Ed. 11/12/11
Reference information — always verify against official Notices to Mariners before navigation.