Chart correction 48/20 — chart 54363
54363 3Ed. 7/14/84 LAST NM 47/20 48/20 Add “Spoil Ground” area [N62.1] bound by dashed line joining 40°17.2′N 25°52.6′E 40°17.4′N 25°55.5′E 40°16.5′N 25°55.6′E 40°16.3′N 25°52.7′E (27(79)20 Istanbul)
Source: NGA U.S. Notice to Mariners · edition: 3Ed. 7/14/84
Reference information — always verify against official Notices to Mariners before navigation.