The Crescent City Amateur Radio Group will hold a nine-night Amateur Radio Technician course beginning at 6:30 p.m., Tuesday, May 15, at the River Ridge Library, 8825 Jefferson Highway, River Ridge. Students will take the national accreditation test on the final night of the course in order to get their amateur radio licenses. Ham radio is a hobby that is enjoyed by thousands of people throughout the world. Local amateur radio operators are valuable communications volunteers following major storms and hurricanes on the Gulf Coast.