The hand-cranked emergency radio transmitter used by crew members to try to contact the rescuers they assume are looking for them was an actual piece of equipment, a BC-778/SCR-578/AN-CRT3 emergency transmitter, affectionately called "Gibson Girl" after the 1890s drawings of Charles Dana Gibson. The narrow-waisted shape of the device allowed the user to hold it between the legs while cranking it — a necessity, because it required 80 rpm to produce enough power to be usable, and was hard to crank.