Home
免费应用程序分析
TVMDC Sailing & Marine Navigation Calculator
TVMDC Sailing & Marine Navigation Calculator Vs. iMariner Celestial Navigation

TVMDC Sailing & Marine Navigation Calculator 对比 iMariner Celestial Navigation 的使用情况和统计数据

TVMDC Sailing & Marine Navigation Calculator

A Simple to Use, Marine Navigation Calculator App - for Sailors and Navigators learning to use Charts. The TVMDC App performs three functions: - * Instant TVMDC corrections between True, Magnetic and Compass bearings. * Set & Drift Calculations from two known Fixes. * Calculation of "Course to Steer" (CTS) based upon a Destination while factoring in both TVMDC and 'Set & Drift' corrections. Allows you to move between True, Magnetic and Compass bearings instantly. A True, Variation, Magnetic, Deviation, Compass (TVMDC) Calculator. Ideal for Sailors who are learning to Navigate with Charts. Includes corrections for : Variation, Annual Magnetic Variation Drift, a boat's Deviation, Set and Drift factors. Simple to use: Input values form the your nearest Chart's Compass Rose: including Variation and Annual Increase. Along with your boat Compass's Deviation. The Calculator will instantly correct between any: True, Magnetic and Compass bearings. Add two known fixes along with your boat's Heading and Speed through the Water. Press Calculate and the App will display your calculated "Set and Drift" values along with a graphical sailing triangle. Any heading or bearing is adjusted for Magnetic Variation and Deviation. Add your Destination and the Calculator will provide your best Course to Steer: factoring in TVMDC and Set and Drift errors. American Sailing Association (ASA) course 105 (Navigation) is an ideal back ground for the App. Also, wikipedia's TVMDC description : http://en.wikipedia.org/wiki/TVMDC YouTube TVMDC App Introduction tutorial: https://www.youtube.com/watch?v=u4d5wCgPxwg Extensive Help at: http://www.arintoapps.com Runs on iPhones 5, 6 and 6+, 7, 7+ in Portrait mode ONLY. Planning on new versions and extensions; so please feedback feature requests?

Apple 应用商店
付费
导航

商店排名

- -

iMariner Celestial Navigation

iMariner Celestial Navigation is a complete toolbox : sight, fix, meridian, starfinder, solar compass Also embedded : nautical almanac (sun, moon, planets, starts) and astronomical computation (no more need for HO-249/HO-229 tables) - displays almanac informations : Sun, Moon, Venus, Mars, Jupiter, Saturn and 92 brightest stars. At this step, you can use these almanac data with HO.249 tables, if you want to reduce manually. - reduces a sight : getting your observed altitude and the precise time, it calculate Intercept and Azimut. You don't need any calculation ! Simply report Intercept and Azimut to your navigational chart. - You can save your observations by passages and send them by email in CSV format - take a fix : with two sights, iMariner is able to calculate your position (latitude/longitude) - meridian passage : iMariner helps you to take observations mandatory to know your position (latitude/longitude) - sight preparation : iMariner proposes you the best objects, here position (azimut and elevation), and the approximate time of the day the observation can take (nautical_twilight or nautical dawn). iMariner is a standalone application. It doesn't require internet connection. It is light and calculations are optimized to save energy on your boat. Includes a solar compass (and moon compass too). REFERENCES : iMariner has been inspirated by astronomical works of the following people. Brightest Stars Catalog Extraction of 92 stars >= 2.5 Mag from the vizier catalog, completed with some stars and star names. V/53A Catalogue of the Brightest Stars (Ochsenbein+ 1988) This research has made use of the VizieR catalogue access tool, CDS, Strasbourg, France vizier.u-strasbg.fr ============================= Le catalogue des etoiles les plus brillantes Catalogue of the brightest stars Ochsenbein F., Halbwachs J.L. =1987BICDS..32...83O Ochsenbein F., Acker A., Legrand E., Poncelet J.M., Thuet-Fleck E. ============================= AlgorithmsFrom the reference book Astronomical Algorithms by Jean Meeus Planets : VSOP87D theoryTables extracted from ftp://ftp.imcce.fr/pub/ephem/planets/vsop87/ and adapted to Objective-C. Bretagnon P., Francou G., : 1988, Astron. Astrophys., 202, 309. Pierre Bretagnon, Gerard Francou Bureau des Longitudes 77, Avenue Denfert-Rochereau F75014, Paris, France Moon : ELP2000 theory The lunar ephemeris ELP2000 M. Chapront-Touze and J. Chapront Service de Mecanique Celeste du Bureau des Longitudes 77, Avenue Denfert-Rochereau F75014, Paris, France Sky Maps Free maps from the IAU site : http://www.iau.org/public/constellations/ DeltaT value maia.usno.navy.mil