Excerpt from Study Arithmetics, Vol. 5The men in the picture are getting a big transport plane ready to carry a heavy load across the ocean. Soon the motors will be started. When they are warmed up and running smoothly, the pilots, the navigator, and all the other members of the ¿ying crew will get into the plane. Then the ¿ight will start.Getting an airplane ready for a ¿ight takes very careful work and checking by many people. Before the plane leaves the ground, the pilots, the mechan ics, and many other workers must be sure that the motors and instruments are working properly and that everything is in order.Of course you know some of the duties of the pilots on a large plane. What are some of the duties of the navigator?About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.