How to crash at sea may seem a little grim as a course of instruction, but the Navy prepares its aviation cadets for every eventuality. Possibly the first thing a cadet learns is that water is hard when he hits it. Simulated "dunkings" are undertaken in a mock-up cockpit, in which the cadet learns about impact, scrambling loose while under water and weighed down with a parachute, and freeing himself while submerged upside-down. He learns that a fighting plane may sink in a matter of seconds and that he must act quickly, without panic.