Chart correction 1817 — chart 4129
Chart 4129 [ previous update 1329/25 ] WGS84 DATUM Insert depth, 20, enclosed by 20m contour 22° 09´·64N., 114° 07´·99E.
Source: UKHO Admiralty Notices to Mariners
Reference information — always verify against official Notices to Mariners before navigation.