Chart correction 477* — chart 3490

Chart 3490 (INT 1643) (Panel A, Seaforth to Tranmere) [ previous update 3461/23 ] ETRS89 DATUM Insert the accompanying block A, centred on: 53° 23´·0N., 3° 00´·2W.

Source: UKHO Admiralty Notices to Mariners

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