Chart correction N9/21 — chart 51146
51146 4Ed. 1/29/11 LAST NM N37/20 N9/21 Relocate Buoy “No 1” from 38°26′59.8″N 8°58′10.4″W to 38°26′54.9″N 8°58′15.1″W (1(106)21 Lisboa)
Source: NGA U.S. Notice to Mariners · edition: 4Ed. 1/29/11
Reference information — always verify against official Notices to Mariners before navigation.