Chart correction N12/23 — chart 24156
24156 4Ed. 07/02/16 LAST NM N07/23 N12/23 Delete Buoy "No 16" 22°57′54.0″S 43°52′44.4″W (See N37/22) Relocate Buoy from 22°57′58.2″S 43°52′54.5″W to 22°57′54.2″S 43°52′44.2″W Change Shape of buoy "No 9" to spar 22°56′23.3″S 43°51′50.2″W Shape of buoy "No 10" to spar 22°56′30.2″S 43°52′08.9″W Shape of buoy "No 12" to spar 22°56′16.0″S 43°51′53.8″W (21(229)22 Rio de Janeiro)
Source: NGA U.S. Notice to Mariners · edition: 4Ed. 07/02/16
Reference information — always verify against official Notices to Mariners before navigation.