KISSINGER, ROSE M. - Navigator's Time Indicator - Visual Training Aid for Navigators

San Francisco: Rose M. Kissinger, 1943. First Edition. Paperback. 8" x 9" stiff beige card folded in half to form four-panel booklet. "Gives a close approximation of figures used in actual problems, sufficient for proof of correct application of formulas; and eliminates the necessity of remembering rules for obtaining the various quantities." - from second panel. Third panel contains rotating map and three independently rotating arrows representing the sun, vernal equinox, and stars, which may be positioned to make the appropriate calculation. Unmarked. Moderate wear and soiling. A sound example of this intriguing tool.; 8vo - over 7¾" - 9¾" tall; Navigator's Time Indicator Nautical Navigation Aids Tools Sun Stars Vernal Equinox Rotating Quick Check Tool Calculator. Good .

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