Chart correction N21/23 — chart 24053
24053 18Ed. 10/30/21 LAST NM N12/23 N21/23 Delete Buoy "Km 12.4" 34°36′32.8″S 58°14′16.5″W Buoy 34°36′41.6″S 58°14′00.6″W Dangerous wreck and buoy in vicinity 34°32′15.0″S 58°21′18.6″W (See N08/23) Add Buoy "Km 12.6" R, pillar, cone topmark, Fl(4) R 16s 34°36′28.2″S 58°14′22.2″W Buoy "Km 12.3" R, pillar, cone topmark, Fl(3) R 12s 34°36′43.2″S 58°13′49.8″W (5(70-72)23 Buenos Aires)
Source: NGA U.S. Notice to Mariners · edition: 18Ed. 10/30/21
Reference information — always verify against official Notices to Mariners before navigation.