Air Almanac[′er ′ȯl·mə‚nak]
A periodical publication of astronomical data useful to and designed primarily for air navigation.
A joint publication of the U.S. Naval Observatory and the Royal Greenwich Observatory, listing the Greenwich hour angle and declination of various celestial bodies at 10-minute intervals, the time of sunrise, sunset, moonrise, and moonset, and other astronomical information arranged in a form convenient for navigators; each publication covers 4 months.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
A joint publication of the National Almanac Office and the U.S. Naval Observatory and Her Majesty's Nautical Almanac Office (UK). It covers a four-month period and contains tabulated values of the Greenwich hour angles and the declination of the selected celestial bodies, along with additional celestial data used in navigation.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved