Nautical Calculator vs Celestial Nav

Nautical Calculator is an easy to use app to help solve the equations and conversions typically associated with marine navigation and includes celestial calculators, conversions calculators, distance calculators, logarithm and trigonometry calculators, and sailings calculators. This app is the finest nautical calculator you will find for the Apple iPhone, iPad, and iPod Touch and includes the computations, tables, and full text of the "The American Practical Navigator" by Nathaniel Bowditch. With more than 35 nautical calculations, unit conversions and reference material, we are sure you will find this app convenient in solving the planning and navigating problems associated with marine navigation. Calculations Include: Celestial Navigation Calculators ------------------------------------------------ 1. Compass Error from Amplitudes Observed on the Visible Horizon 2. Altitude Correction for Air Temperature 3. Table of Offsets 4. Latitude and Longitude Factors 5. Altitude Correction for Atmospheric Pressure 6. Altitude Factors & Change of Altitude 7. Pub 229 8. Compass Error from Amplitudes Observed on the Celestial Horizon 9. Meridian Angle and Altitude of a Body on the Prime Vertical Circle Conversions Calculators ------------------------------------------------ 1. Chart Scales and Conversion for Nautical and Statute Miles 2. Conversion for Meters, Feet and Fathoms Distance Calculators ------------------------------------------------ 1. Length of a Degree of Latitude and Longitude 2. Speed for Measured Mile and Speed, Time, and Distance 3. Distance of an Object by Two Bearings 4. Distance of the Horizon 5. Distance by Vertical Angle Measured Between Sea Horizon and Top of Object Beyond Sea Horizon 6. Traverse Table 7. Geographic Range 8. Distance by Vertical Angle Measured Between Waterline at Object and Top of Object 9. Dip of Sea Short of the Horizon 10. Distance by Vertical Angle Measured Between Waterline at Object and Sea Horizon Beyond Object 11. Meridional Parts Log and Trig Calculators ------------------------------------------------ 1. Log10 2. tangent 3. cosecant 4. sine 5. cotangent 6. cosine 7. secant Sailings Calculators ------------------------------------------------ 1. Great Circle Sailing 2. Mercator Sailing Time Zones Calculators ------------------------------------------------ 1. Time Zones 2. Zone Descriptions, and Suffixes Weather Data Calculators ------------------------------------------------ 1. Direction and Speed of True Wind 2. Correction of Barometer Reading for Height Above Sea Level 3. Correction of Barometer Reading for Gravity 4. Temperature Conversions 5. Relative Humidity and Dew Point 6. Correction of Barometer Reading for Temperature 7. Barometer Measurement Conversions Included Reference Documents ------------------------------------------------ 1. AMERICAN PRACTICAL NAVIGATOR - VOL 1 2. AMERICAN PRACTICAL NAVIGATOR - VOL 2 3. SIGHT REDUCTION TABLES VOL 1 0° - 15° 4. SIGHT REDUCTION TABLES VOL 2 15° - 30° 5. SIGHT REDUCTION TABLES VOL 3 30° - 45° 6. SIGHT REDUCTION TABLES VOL 4 45°- 60° 7. SIGHT REDUCTION TABLES VOL 5 60°- 75° 8. SIGHT REDUCTION TABLES VOL 6 75°- 90° Learn more at http://www.NauticalCalculator.com

We believe celestial navigation is an amazing skill and develop Celestial Nav to offer a simple, yet powerful and all encompassing app for our users. Celestial Nav is an easy to use, all-in-one tool which offers: • Celestial navigational computations for your device • Simple toolbar menu for quick access • Internally stored perpetual Almanac • Offline ready and functional without the need for other external tools • Quick and easy capture celestial observation data • High accuracy sight reductions • Star reference tables SIGHT PLANNING • Local Hour Angle (LHA) for Aries • Star tables sorted by name, magnitude, declination, and SHA • Sunrise, sunset, twilight, and location reference • Moon phase reference SIGHT REDUCTION • High accuracy sight reduction algorithm • Perpetual Almanac offering accurate data for years 1600 - 3000 • Almanac data for Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn • Detailed Almanac data for 58 navigational stars • Assumed Position (AP) for any user defined position • Line of Position (LOP) intercept data for accurate course and speed adjustments • Computational variables displayed for accuracy and validation CELESTIAL FIX • Computations by USNO algorithm in the Nautical Almanac • Save all your LOP in an easy reference table BASIC VERSION Free daytime celestial navigation tools using the sun: • Unlimited sextant sight reduction calculations • Sight reduction to a line of position using the sun • Perpetual almanac for the sun • Advanced sight corrections for index error, eye height, temperature, and pressure • Support for upper and lower limb reference • Star Table with navigational references • Detailed Sun references • Limited Moon references PRO FEATURES (IN-APP PURCHASE) Advanced Day & Night Celestial Navigation includes all BASIC features plus: • Almanac data for 65 navigational bodies for years 1600 through 3000 • Map display for saved LOPs • View intercepts with course and speed corrections • Metric and imperial unit support with automatic conversions • Support for coordinate entries in different formats (H° M’ S” or Decimals) • Save all your LOP calculations for future reference • Save user preferences and settings • Unrestricted moon references • Almanac and algorithmic models for 65 navigational bodies: • Sun, Moon, Mercury, Venus, Mars, Jupiter, and Saturn • 58 navigational stars Supported stars: Acamar, Achernar, Acrux, Adhara, Aldebaran, Alioth, Alkaid, Alnair, Alnilam, Alphard, Alphecca, Alpheratz, Altair, Ankaa, Antares, Arcturus, Atria, Avior, Bellatrix, Betelgeuse, Canopus, Capella, Deneb, Denebola, Diphda, Dubhe, Elnath, Eltanin, Enif, Fomalhaut, Gacrux, Gienah, Hadar, Hamal, Kaus Australis, Kochab, Markab, Menkar, Menkent, Miaplacidus, Mirfak, Nunki, Peacock, Polaris, Pollux, Procyon, Rasalhague, Regulus, Rigel, Rigil Kent., Sabik, Schedar, Shaula, Sirius, Spica, Suhail, Vega, Zubengenubi REFERENCES Sight reductions and celestial calculations use various internationally accepted references for the most accurate results: • Jean Meeus - Astronomical Algorithms • US Naval Observatory (USNO) Almanac and Algorithms • Hipparcos New Astrometric Catalog, Published 2007 • ELP2000-85 SUBSCRIPTION TERMS Celestial Nav is free to download and the basic features free to use. A paid upgrade to the PRO version provides access to premium features and additional tools. We may offer trial subscriptions that give limited time access to all PRO features and premium content for the duration of the trial period. Trial subscriptions automatically expire and the app will revert back to the Basic version thereafter. No data is lost but access and use of premium features will no longer be available.