Chart correction N20/23 — chart 54321
54321 3Ed. 02/28/09 LAST NM N14/23 N20/23 Delete Submarine cable between 36°29′25″N 25°23′09″E 36°29′17″N 25°23′15″E (See N14/23) Add Submarine cable [L30.1] between 36°29′25″N 25°23′09″E 36°28′54″N 25°23′12″E (3(64)23 Athens)
Source: NGA U.S. Notice to Mariners · edition: 3Ed. 02/28/09
Reference information — always verify against official Notices to Mariners before navigation.