Chart correction 4636 — chart 1720
Chart 1720 [ previous update 4476/26 ] CGCS 2000 DATUM Insert symbol, Virtual aid to navigation, isolated danger topmark, V- AIS 24° 12´·79N., 118° 07´·52E.
Source: UKHO Admiralty Notices to Mariners
Reference information — always verify against official Notices to Mariners before navigation.