SAFETY / LAKE MICHIGAN - DE TOUR PASSAGE TO MUNUSCONG LAKE / ATON / SEC NGL BNM 0021-25 /
1. PER 33 CFR 162.117 VTS ST MARY'S RIVER PLANS TO OPEN PIPE ISLAND PASSAGE TO THE EAST OF PIPE ISLAND SHOAL AND NORTH OF PIPE ISLAND TWINS. PIPE ISLAND COURSE RETURNS TO A ONE-WAY ROUTE, EFFECTIVE 0800 LOCAL 20 MAR 25.//
