Chart correction N9/20 — chart 52143

52143 9Ed. 11/25/17 LAST NM N5/20 N9/20 Substitute Rock which covers and uncovers [K11] for dangerous submerged rock 40°01′57″N 4°10′57″E Rock which covers and uncovers [K11] for dangerous submerged rock 40°02′00″N 4°11′00″E Add Danger circle [K1] to rock 40°02′09″N 4°11′17″E (4(23)20 Cadiz)

Source: NGA U.S. Notice to Mariners · edition: 9Ed. 11/25/17

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