Aerial Navigation [Pt. I, II] (the compass and the map)-

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Extra resources for Aerial Navigation [Pt. I, II] (the compass and the map)- Div. Mil. Aeronautics, US Army

Example text

The pilot should also have facility with a time scale, described under "Map reading. 1 ' COMPASS ADJUSTMENT. Compass adjustment is the process of eliminating, as far as possible, compass caused by the magnetic material in the ship. This adjustment is effected by swinging the compass on a temporary or permanent swinging base, which is essentially a central point with the magnetic. cardinal and quadrantal points laid off around it. each point. A temporary swinging base, such as is constructed at an aerodrome near the fighting line, is located out in the field, at least 50 yards away from any magnetic material.

Ground speed, it will take about 4X10 minutes for the flight. To fly from Paris to Meaux, a map distance of 8 inches at 90 m. p. h. ground speed will take, applying the tune scale, about 2JX10 minutes, equals 23 minutes. These examples may be worked out to whatever degree of accuracy required by the circumstances; for example, in the foregoing, 23 minutes would be a sufficient degree of accuracy. On the time scale it will be found that 60 is twice as far from as 30 and that 120 is twice as far from as 60, etc.

Example bearing. , find true AERIAL NAVIGATION. PART II. THE MAP. INTRODUCTION. In our study of aerial navigation so far, we have been concerned primarily with the compass. This instrument helps us to find our objective, once we know the track, but it can not determine the track. The map, on the other hand, not only helps us to stay on the track we go along, but shows us what track to take in order to arrive at a desired point. The plan for a flight must be made from the map. On the map the flight is taken in theory.

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