Chart correction N18/23 — chart 37228

37228  15Ed.  02/16/13  LAST  NM  N14/23  N18/23 Add Foul ground symbol [K31.1]   53°53′13.8″N  9°11′42.4″E (14(1711)23 Hamburg)

Source: NGA U.S. Notice to Mariners · edition: 15Ed. 02/16/13

Reference information — always verify against official Notices to Mariners before navigation.