Chart correction N25/20 — chart 51163
51163 5Ed. 12/3/16 LAST NM N21/20 N25/20 Change Characteristic of beacon to 2 Fl(4) Y 11s 36°47′25.3″N 6°21′09.8″W (20(155)20 Cadiz)
Source: NGA U.S. Notice to Mariners · edition: 5Ed. 12/3/16
Reference information — always verify against official Notices to Mariners before navigation.