Chart correction N4/21 — chart 37401

37401 10Ed. 3/11/17 LAST NM N23/20 N4/21 Add Buoy Y, can, “X” topmark, Fl(5) Y 20s [Q130.6] 46°07′43″N 1°20′33″W Buoy Y, can, “X” topmark, Fl(5) Y 20s [Q130.6] 46°07′42″N 1°20′42″W Buoy Y, can, “X” topmark, Fl(5) Y 20s [Q130.6] 46°08′46″N 1°24′26″W Buoy Y, can, “X” topmark, Fl(5) Y 20s [Q130.6] 46°08′36″N 1°24′30″W (7(61)20 Brest)

Source: NGA U.S. Notice to Mariners · edition: 10Ed. 3/11/17

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