Chart correction N18/23 — chart 53149

53149   4Ed.  12/04/21  LAST  NM  N13/23  N18/23 Substitute Purple composite line (entry prohibited area limit) [N2.2] for purple composite line joining   42°07′48.7″N  11°45′11.4″E   42°07′07.5″N  11°44′57.2″E   42°07′22.3″N  11°45′42.8″E Note: Purple composite line and legend "Area to be Avoided SEE NOTE" remain Add Note "DEPTHS - COASTLINES There may be significant differences between the bathymetry and topography of this chart and the actual situation. Coastlines and underwater/awash dangers, such as rocks and shallows, may be uncharted or inaccurately charted. Particular caution is advised."   42°08′21.0″N  11°47′12.0″E (6(7), 7(1)23 Genova)

Source: NGA U.S. Notice to Mariners · edition: 4Ed. 12/04/21

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