Chart correction N27/20 — chart 51164
51164 19Ed. 9/24/16 LAST NM N21/20 N27/20 Substitute Danger circle “Obstn” [K40] for depth 8.9 meters 36°36′00″N 6°23′51″W (21(162)20 Cadiz)
Source: NGA U.S. Notice to Mariners · edition: 19Ed. 9/24/16
Reference information — always verify against official Notices to Mariners before navigation.