Chart correction N31/23 — chart 24052

24052  17Ed.  04/30/11  LAST  NM  N25/23  N31/23 Delete Beacon "UNEN"   34°28′20″S  58°28′14″W Substitute Beacon "UNEN A" RW, ball topmark, Mo(A) W 10s [Q130.5] for buoy "A UNEN"   34°29′36″S  58°17′28″W Beacon "UNEN B" RW, ball topmark, Mo(A) W 6s [Q130.5] for buoy "B UNEN"   34°30′52″S  58°19′35″W Add Buoy "Km 16" R, pillar, cone topmark, Fl(2) R 8s with legend "SYNC"   34°37′03″S  58°11′33″W Beacon "KM 19.3 UNEN" RW, ball topmark, Mo(A) W 10s [Q130.5]   34°28′15″S  58°28′09″W Legend "SYNC" to buoy "Km 19"   34°37′23″S  58°09′41″W Add Color Y to buoy "Km 13.5"   34°36′36″S  58°13′07″W (See N05, N09/23) (7(95)23 Buenos Aires; 5(53)23 Montevideo)

Source: NGA U.S. Notice to Mariners · edition: 17Ed. 04/30/11

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