Chart correction N42/20 — chart 24057
24057 6Ed. 2/11/12 LAST NM N41/20 N42/20 Relocate Buoy “Km 204.4” from 35°10′54″S 56°19′11″W to 35°10′13″S 56°20′48″W Add Buoy R, pillar, cone topmark, Fl R 4s 35°10′01″S 56°20′46″W (URY CH 40)
Source: NGA U.S. Notice to Mariners · edition: 6Ed. 2/11/12
Reference information — always verify against official Notices to Mariners before navigation.