Chart correction N21/22 — chart 55049

55049 7Ed. 03/16/13 LAST NM N20/22 N21/22 (Panel B) Add Buoy Y, pillar, "X" topmark, Fl(2) Y 6s [Q130.6] 40°43′43.8″N 29°47′42.4″E (10(33)22 Istanbul)

Source: NGA U.S. Notice to Mariners · edition: 7Ed. 03/16/13

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