Chart correction N21/21 — chart 51163
51163 5Ed. 12/3/16 LAST NM N14/21 N21/21 Add Legend “Mooring Buoys” between 36°48′28.9″N 6°20′43.0″W 36°48′01.3″N 6°20′34.3″W Legend “Mooring Buoys” between 36°47′40.2″N 6°21′13.8″W 36°47′48.0″N 6°20′48.0″W Mooring buoy, can [Q40] with legend “(2 Buoys)” 36°47′52.8″N 6°20′25.2″W (16(112)21 Cadiz)
Source: NGA U.S. Notice to Mariners · edition: 5Ed. 12/3/16
Reference information — always verify against official Notices to Mariners before navigation.