Chart correction N47/20 — chart 44100
44100 9Ed. 3/29/14 LAST NM N42/20 N47/20 Add Sunken mine [N23.1] enclosed by purple composite-line circle, radius 0.4 mile, centered 54°22.9′N 12°05.5′E Sunken mine [N23.1] enclosed by purple composite-line circle, radius 0.4 mile, centered 54°22.8′N 12°07.7′E (41(36)20 Hamburg)
Source: NGA U.S. Notice to Mariners · edition: 9Ed. 3/29/14
Reference information — always verify against official Notices to Mariners before navigation.