Chart correction 50/20 — chart 55040

55040 4Ed. 7/31/99 LAST NM 49/20 50/20 Substitute Beacon BRB, double ball topmark, Fl(2) W 5s 10M AIS [Q130.4] for light 40°56.2′N 29°05.3′E (43(143)20 Istanbul)

Source: NGA U.S. Notice to Mariners · edition: 4Ed. 7/31/99

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