Chart correction N12/20 — chart 44310
44310 6Ed. 12/14/13 LAST NM N2/20 N12/20 Delete Buoy 61°25.7′N 21°12.0′E Buoy 62°40.7′N 20°52.6′E Buoy 61°31.2′N 21°12.0′E Buoy 62°19.7′N 21°04.6′E Buoy 62°18.8′N 21°04.1′E Beacon 60°52.0′N 21°00.7′E Relocate Buoy from 62°39.4′N 20°50.3′E to 62°39.2′N 20°51.3′E (6(71)17, 15(161), 16(184)18, 1(5)20 Helsinki)
Source: NGA U.S. Notice to Mariners · edition: 6Ed. 12/14/13
Reference information — always verify against official Notices to Mariners before navigation.