Chart correction 4509 — chart 4121

Chart 4121 [ previous update 5733/25 ] WGS84 DATUM Insert depth, 157 (a) 22° 12´·436N., 114° 06´·020E. Delete depth, 153 , close SE of: (a) above Wk01/26 II 2.15 46 KOREA - West Coast - Buoy. Source: Korean Notice 32/479/25 Note:This update is included in New Editions 1258 and 3480, published early 2026.

Source: UKHO Admiralty Notices to Mariners

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