Chart correction 49/21 — chart 37106
37106 4Ed. 01/23/99 LAST NM 46/21 49/21 Delete Radio tower symbol and legend "2 Pylons (RW Lts) Maritime Radio Center" 50°42′55″N 1°37′42″E Whistle from buoy "Boulogne Approach" 50°45′19″N 1°31′05″E (49(16)06 Brest; FRA CH 7247)
Source: NGA U.S. Notice to Mariners · edition: 4Ed. 01/23/99
Reference information — always verify against official Notices to Mariners before navigation.