Chart correction N42/21 — chart 55046

55046 5Ed. 8/4/12 LAST NM N33/21 N42/21 Add Buoy Y, can, “X” topmark, Fl Y 3s [Q130.6] 40°57′27″N 28°40′24″E (33(120)21 Istanbul) ★55060 9Ed. 9/4/21 NEW EDITION N42/21 (NGA)

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

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