Chart correction N40/23 — chart 54169
54169 4Ed. 06/19/21 LAST NM N34/23 N40/23 Add Period 3s to superbuoy "ODAS I" 45°05′00″N 13°36′18″E Period 3s to superbuoy "ODAS II" 45°04′24″N 13°30′54″E (See N4/23) (HRV LL)
Source: NGA U.S. Notice to Mariners · edition: 4Ed. 06/19/21
Reference information — always verify against official Notices to Mariners before navigation.