Chart correction 1644* — chart 4021

Chart 4021 (INT 21) [ previous update New Edition 12/06/2025 ] WGS84 DATUM Insert depth, 141, and extend 200m contour E to enclose (a) 12° 55´·5S., 5° 43´·9W. Delete depth, 158, close SE of: (a) above Insert depth, 263, and extend 1000m contour E to enclose (b) 12° 53´·9S., 5° 22´·4W. Delete depth, 942, close NE of: (b) above Insert depth, 519, and extend 1000m contour W to enclose (c) 39° 58´·2S., 6° 46´·7W. Delete depth, 2622, close NW of: (c) above Insert depth, 89, and extend 200m contour NW to enclose (d) 40° 07´·1S., 8° 36´·2W. Delete depth, 143, close SE of: (d) above

Source: UKHO Admiralty Notices to Mariners

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