Chart correction N52/21 — chart 54339
54339 9Ed. 03/28/09 LAST NM N31/21 N52/21 Delete Depth 17.6 meters 37°58′46.4″N 23°32′18.4″E Substitute Foul ground symbol [K31.1] for mooring buoy 37°58′35.8″N 23°32′28.2″E Add Depth 14.1 meters Wk [K26] 37°58′46.2″N 23°32′16.9″E Depth 6.1 meters Wk [K26] 37°58′28.9″N 23°33′06.2″E (10(160, 161)21 Athens)
Source: NGA U.S. Notice to Mariners · edition: 9Ed. 03/28/09
Reference information — always verify against official Notices to Mariners before navigation.