Chart correction 4493* — chart 5612_23
Chart 5612_23 (Panel C, River Foyle Ballynagard to Londonderry) [ previous update 951/23 ] ETRS89 DATUM Insert · 2F.G(vert) 55° 00´·356N., 7° 19´·115W. 55° 00´·426N., 7° 19´·051W.
Source: UKHO Admiralty Notices to Mariners
Reference information — always verify against official Notices to Mariners before navigation.