Chart correction 4231 — chart 1663
Chart 1663 (INT 1953) [ previous update 4580/19 ] UNDETERMINED DATUM Insert ¼{ 16° 03´·9N., 16° 36´·1W. Wk47/23 II 2.36
Source: UKHO Admiralty Notices to Mariners
Reference information — always verify against official Notices to Mariners before navigation.