Chart correction N2/21 — chart 54337
54337 4Ed. 4/11/09 LAST NM N18/20 N2/21 Add Explosives dumping ground symbol [N23.1] (PA) 37°55′32.4″N 23°23′04.2″E (9(133)20 Athens)
Source: NGA U.S. Notice to Mariners · edition: 4Ed. 4/11/09
Reference information — always verify against official Notices to Mariners before navigation.