Chart correction 3970 — chart 1738
Chart 1738 [ previous update 3377/25 ] CGCS 2000 DATUM Insert symbol, Virtual aid to navigation, isolated danger topmark, V- AIS 28° 42´·10N., 122° 18´·70E.
Source: UKHO Admiralty Notices to Mariners
Reference information — always verify against official Notices to Mariners before navigation.