Chart correction 2687* — chart 1413
Chart 1413 [ previous update 1917/23 ] ETRS89 DATUM Amend fog signal to, Horn(1)20s, at light 53° 19´·85N., 4° 37´·16W.
Source: UKHO Admiralty Notices to Mariners
Reference information — always verify against official Notices to Mariners before navigation.