Chart correction N49/20 — chart 54166

54166 4Ed. 2/25/17 LAST NM N42/20 N49/20 Substitute Beacon Y, “X” topmark, Fl Y 2s 6m 4M [Q130.6] for buoy 45°26′04.0″N 12°24′33.8″E Beacon Y, “X” topmark, Fl Y 2s 6m 4M [Q130.6] for buoy 45°26′08.3″N 12°24′40.3″E (See N52/19) (ITA CH 226)

Source: NGA U.S. Notice to Mariners · edition: 4Ed. 2/25/17

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