Chart correction N21/20 — chart 37261
37261 11Ed. 10/28/17 LAST NM N19/20 N21/20 Delete Depth 25 meters 49°40′30″N 0°02′54″E Depth 25 meters 49°40′42″N 0°03′29″E Substitute Foul ground symbol [K31.1] for danger circle “Obstn” 49°28′15″N 0°09′52″W Add Depth 23.5 meters 49°40′32″N 0°03′20″E (24(50)16, 3(48)18 Brest; FRA CH 7418)
Source: NGA U.S. Notice to Mariners · edition: 11Ed. 10/28/17
Reference information — always verify against official Notices to Mariners before navigation.