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Major Ocker has been a foremost pioneer of the art of flying blind in fog or in a hooded plane, relying entirely on instruments. This interesting and readable book thoroughly covers the subject, most of its two hundred pages being devoted to a discussion of the various instruments available and their use in blind flight. The introductory chapter contains a brief historical review, and the second chapter discusses briefly the function of the various senses in orientation in space with particular reference to the vestibular apparatus.
In the early days of aviation it was assumed that a normally functioning labyrinth was necessary for successful flying. The authors point out that, on the contrary, a flier must, first of all, learn to disregard the false impressions given by the internal ears during flight. For example, in executing a banked turn the centrifugal force plus gravity gives, to the beginner, the sensation
Blind Flight in Theory and Practice.. Arch Otolaryngol. 1933;17(3):446. doi:10.1001/archotol.1933.03570050434014