Chart correction N31/20 — chart 23141
23141 8Ed. 10/13/12 LAST NM N33/17 N31/20 Substitute Foul ground symbol [K31.1] for buoy 37°56.3′S 57°28.3′W Add Foul ground symbol [K31.1] 37°59.8′S 57°30.0′W Foul ground symbol [K31.1] 37°59.7′S 57°30.4′W Dangerous wreck [K28] 38°03.4′S 57°30.7′W (6(77)16, 5(72), 9(136)18, 5(49, 50)20 Buenos Aires)
Source: NGA U.S. Notice to Mariners · edition: 8Ed. 10/13/12
Reference information — always verify against official Notices to Mariners before navigation.