Chart correction 20/25 — chart 550
550 7Ed. 02/09/85 LAST NM 17/25 20/25 Add Light flare symbol [P1.2] 18°06′N 106°26′E (VNM CH 30007)
Source: NGA U.S. Notice to Mariners · edition: 7Ed. 02/09/85
Reference information — always verify against official Notices to Mariners before navigation.