Chart correction N30/21 — chart 55046

55046 5Ed. 8/4/12 LAST NM N26/21 N30/21 Add Superbuoy Y, “X” topmark, Fl(5) Y 20s Racon (U) with legend “ODAS (3 buoys)” [Q58] 40°55′06″N 29°02′19″E (19-20(76)21 Istanbul) NM 30/21 SECTION I I-1.6

Source: NGA U.S. Notice to Mariners · edition: 5Ed. 8/4/12

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