Chart correction N17/21 — chart 37231
37231 19Ed. 11/12/11 LAST NM N49/20 N17/21 Delete Depth 17.7 meters 53°59′05″N 8°26′39″E Depth 15.9 meters 53°58′59″N 8°26′43″E Add Depth 13.6 meters 53°59′02″N 8°26′53″E (10(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.