NASA NTRS · 19930080908
An Optical Altitude Indicator for Night Landing
Abstract
One of the most ingenious of the devices intended for use in night landing, especially emergency landing, is a very simple optical instrument known as the Jenkins night altitude indicator. The design and operation of this instrument, which allows a pilot to determine the altitude of the aircraft, is discussed. The author discusses various modifications and improvements that might be made to the instrument.
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Warner, John A C. 1923-01-01. An Optical Altitude Indicator for Night Landing. https://ntrs.nasa.gov/citations/19930080908
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