Chart correction 4021 — chart 3457

Chart 3457 [ previous update 2725/26 ] NAD83 DATUM Insert depth, 6, enclosed by 6ft contour 40° 40´·010N., 74° 08´·127W. depth, 23, and extend 30ft contour S to enclose (a) 40° 40´·804N., 74° 08´·674W. Delete depth, 9, and associated 18ft contour, close E of: (a) above

Source: UKHO Admiralty Notices to Mariners

Reference information — always verify against official Notices to Mariners before navigation.