Chart correction 1790 — chart 3221
Chart 3221 (INT 1876) [ previous update 2149/24 ] WGS84 DATUM Insert GqVVQ(6)+LFl.10s3M Cais Colunas 38° 42´·350N., 9° 08´·140W.
Source: UKHO Admiralty Notices to Mariners
Reference information — always verify against official Notices to Mariners before navigation.