Chart correction N30/21 — chart 91297
91297 10Ed. 4/2/11 LAST NM N7/21 N30/21 Change Period of beacon to 5s 14°34′21.1″N 120°57′20.4″E (11(58)20 Manila)
Source: NGA U.S. Notice to Mariners · edition: 10Ed. 4/2/11
Reference information — always verify against official Notices to Mariners before navigation.