Chart correction 04/24 — chart 54403
54403 4Ed. 06/14/86 LAST NM 18/23 04/24 Add Buoy Y, pillar, "X" topmark, Fl Y 5s [Q130.6] 37°35′53″N 27°04′31″E Buoy Y, pillar, "X" topmark, Fl Y 3s [Q130.6] 37°35′03″N 27°05′21″E (17(86)23 Istanbul)
Source: NGA U.S. Notice to Mariners · edition: 4Ed. 06/14/86
Reference information — always verify against official Notices to Mariners before navigation.