Chart correction N21/20 — chart 37166

37166 4Ed. 1/11/14 LAST NM N16/20 N21/20 Delete Depth 28.5 meters Obstn 53°04.5′N 4°23.4′E Substitute Foul ground symbol [K31.1] for depth 25.5 meters 53°01.9′N 4°21.9′E Add Depth 29 meters Obstn [K41] 53°04.6′N 4°24.3′E Swept depth 26 meters Obstn [K42] 53°03.9′N 4°24.4′E Buoy “MW 1-SNW 4” BYB, pillar, double cone topmark bases together, VQ(3) W 5s [Q130.3] 51°50.1′N 3°03.5′E (31(246)17, 13(119)20 Den Haag)

Source: NGA U.S. Notice to Mariners · edition: 4Ed. 1/11/14

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