Chart correction 1871 — chart 1254
Chart 1254 [ previous update 1591/24 ] CGCS 2000 DATUM Insert symbol, Virtual aid to navigation, isolated danger topmark, V- AIS, out of position 36° 52´·1N., 122° 46´·3E. 36° 49´·7N., 122° 50´·2E. 36° 46´·9N., 122° 30´·8E. 36° 43´·6N., 122° 55´·2E. 36° 27´·8N., 122° 39´·5E. 36° 07´·6N., 121° 11´·4E.
Source: UKHO Admiralty Notices to Mariners
Reference information — always verify against official Notices to Mariners before navigation.