Chart correction 1849 — chart 4721
Chart 4721 (INT 721) [ previous update 1675/24 ] WGS84 DATUM Insert fog signal, Horn, at platform 13° 53´·6S., 128° 29´·0E.
Source: UKHO Admiralty Notices to Mariners
Reference information — always verify against official Notices to Mariners before navigation.