Instructions for use of the Navigational Computer Type "D" Compiled by the Engineering Department of American Airlines, Inc. were published November 1, 1946. Sold by Goble Aircraft Specialties, Inc. in Flushing, New York.
This computer was developed to aid the pilot in controlling his flight under all conditions of wind and weather. Stated on page 3 of the manual. Practically all problems encountered in air navigation except those involving Celestial Navigation maybe solved accurately and rapidly by the use of this computer. Proficiency in its use demands persistent practice, and it is suggested that before attempting to use it in the air, the pilot work a number of practice examples on the ground.Return to Goble Artifacts