aquot;A curriculum for schools, manual for teachers, handbook for operators, and textbook for students. ... Different kinds of broadcasts, such as childrena#39;s, remote control, forum discussion, and audience participation broadcasts are covered ... He tells of the hazards, the variety of jobs, and of encounters with sharks and whales. ... 20 The Booklist Diving, Submarine Ellsberg Men under the sea 84 Meier Up for air.