Chart correction 4977 — chart 1663

Chart 1663 (INT 1953) [ previous update 3254/24 ] UNDETERMINED DATUM Insert the accompanying block, centred on: 16° 03´·8N., 16° 46´·6W.

Source: UKHO Admiralty Notices to Mariners

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