Chart correction 642 — chart 4240

Chart 4240 [ previous update 4351/24 ] PSAD56 DATUM Insert depth, 42, and extend danger line, dotted line, NE to enclose (a) 37° 05´·5S., 73° 30´·9W. Delete depth, 7, close SW of: (a) above .ED and associated legend Ra Cockatrice 37° 04´·6S., 73° 35´·3W. .ED and associated legend Ra Hector 37° 06´·8S., 73° 35´·6W.

Source: UKHO Admiralty Notices to Mariners

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