Chart correction N31/21 — chart 37244

37244 13Ed. 9/28/13 LAST NM N29/21 N31/21 Substitute Platform (lighted) “HZB” [L2] HORN, enclosed by purple composite-line circle, radius 500 meters for depth 18.4 meters 52°15.5′N 4°05.1′E (26(225)21 Den Haag)

Source: NGA U.S. Notice to Mariners · edition: 13Ed. 9/28/13

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