Chart correction N21/23 — chart 17522
17522 1Ed. 05/11/87 LAST NM N36/20 N21/23 Add Legend "Booms" 50°31′16″N 125°49′24″W (Continuation) Add Legend "Booms" 50°31′16″N 125°49′24″W (2/23 Ottawa)
Source: NGA U.S. Notice to Mariners · edition: 1Ed. 05/11/87
Reference information — always verify against official Notices to Mariners before navigation.