EZ Lunars

Discover the fascinating art of lunar distance navigation! Before accurate marine chronometers became widely available, navigators used the angular distance between the Moon and other celestial bodies to determine Greenwich time and longitude. ezLunarsOne brings this historic method into the modern world, combining traditional Nautical Almanac tables with tools to learn, practice, and perform lunar observations. TRADITIONAL LUNAR DISTANCE TABLES The Nautical Almanac last published precomputed lunar distances in 1906. ezLunarsOne recreates these tables for modern dates, including: Lunar distances for up to six navigational bodies each day. Traditional three-hour intervals and new hourly tables for navigators using the Stark Tables. Proportional logarithms for interpolation. Moon augmented semidiameter and second differences tables. Everything needed to work lunar distances manually with pencil and paper is available in the app. AUTOMATED LUNAR DISTANCE NAVIGATION ezLunarsOne guides you through planning observations, recording sextant readings, clearing the measured lunar distance, and determining Greenwich time. View the complete solution in a traditional lunar clearing form, with calculations and table values you can examine step by step. LEARN AND PRACTICE TRADITIONAL NAVIGATION Follow the automated solution to understand the process, then work through the same observations yourself using the included tables. Generate high-resolution lunar distance tables, completed lunar clearing reports, and blank forms to save as PDFs or print for manual use. NAUTICAL ALMANAC INCLUDED Lunar calculations also require Nautical Almanac data. ezLunarsOne includes the Nautical Almanac pages needed for lunar observations, available for reference and manual use. PDF REPORTS AND DOCUMENTATION The built-in PDF viewer lets you view, save, and print tables, lunar clearing reports, and documentation. Navigate long documents with fast scrolling and direct page selection. ACCURATE CALCULATIONS — NO INTERNET REQUIRED Astronomical calculations use NOVAS software from the U.S. Naval Observatory and a JPL planetary ephemeris covering 1960 through 2059. All calculations run directly on your device, without an internet connection. Whether you're an experienced navigator, student, instructor, or history enthusiast, ezLunarsOne makes a remarkable traditional navigation technique accessible today.