Chart correction N26/20 — chart 24052
24052 17Ed. 4/30/11 LAST NM N18/20 N26/20 Delete Buoy 34°28′07″S 57°52′09″W Add Buoy RW, pillar, ball topmark, L Fl W 10s [Q130.5] 34°28′04″S 57°51′56″W (Plan B) Delete Buoy “No 6” 34°28′09.0″S 57°52′09.0″W Buoy 34°28′19.0″S 57°51′46.2″W (1(25), 3(34)18 Montevideo)
Source: NGA U.S. Notice to Mariners · edition: 17Ed. 4/30/11
Reference information — always verify against official Notices to Mariners before navigation.