A NEW PERISCOPIC SEXTANT

Virginia Withington

Abstract: The need for a periscopic sextant has been felt since the advent of closed cabin aircraft. Windows and windshields cause unpredictable distortions of the line of sight and do not permit the observation of celestial bodies at high angles.
Published in: NAVIGATION, Journal of the Institute of Navigation, Volume 1, Number 11
Pages: 210 - 215
Cite this article: Withington, Virginia, "A NEW PERISCOPIC SEXTANT", NAVIGATION, Journal of The Institute of Navigation, Vol. 1, No. 11, 1948, pp. 210-215.
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