Nautical Calculator vs Sight Calc Usage & Stats

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

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Sight Calc

Sight Calc is a specialized calculator for calculating sight reductions via the "Law of Cosines" method. It does not use Nautical Almanac data, so you must first compute LHA (Local Hour Angle) and declination, and determine your approximate latitude. It is designed particularly for students learning celestial navigation, such as the Celestial Navigation courses taught by the United States Power Squadrons®. If you are unfamiliar with how to do sight reductions, some good resources are available from the United States Power Squadrons® at www.usps.org. In particular, this calculator is useful in conjunction with Form SR96a, www.usps.org/eddept/n/files/sr96a.pdf Inputs may be entered as two numbers: Degrees - left column Minutes - right column Or enter as decimal degrees (e.g., 44.48833). Sight Calc will prompt you to enter six number in sequence: LHA (degrees) LHA (minutes) Lat (degrees) Lat (minutes) Dec (degrees) Dec (minutes) In v 2.0 you may enter values in any sequence. Hc, Z and Zn are continuously computed and displayed. Be sure to enter North Latitude as a positive number and South Latitude as a NEGATIVE number. Sight Calc will take the absolute value of Latitude in the law of cosines formula, but needs the hemisphere to calculate azimuth (Zn). Similarly, enter Declination as positive if North and negative if South. (Note: this differs from version 1.x of Sight Calc.) If you want to do repeated calculations with some of the same numbers, just enter the changed numbers. To start over fresh at any time, press "C" to clear everything. "CE" key clears the Current Entry. Optionally, use the "o" key to convert minutes to decimal degrees, add that to the degrees field, and clear the minutes field. This has no effect on the calculation. Please report any bugs or suggestions to: sightcalc@nuvocom.com