Chart correction N30/21 — chart 55047

55047 9Ed. 11/8/14 LAST NM N14/21 N30/21 Add Superbuoy Y, “X” topmark, Fl(5) Y 20s Racon (U) with legend “ODAS (3 buoys)” [Q58] 40°55′06.2″N 29°02′18.8″E (19-20(76)21 Istanbul)

Source: NGA U.S. Notice to Mariners · edition: 9Ed. 11/8/14

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