Chart correction N9/21 — chart 55021

55021 1Ed. 7/27/19 LAST NM N18/20 N9/21 Delete Buoy 40°00′31.7″N 26°14′49.3″E Change Superbuoy to Y, “X” topmark, Fl Y 4s Racon (U) AIS with legend “ODAS” 40°02′44.0″N 26°12′29.2″E (See N18/20) (2(7)21 Istanbul)

Source: NGA U.S. Notice to Mariners · edition: 1Ed. 7/27/19

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