Celestial Nav vs Binnacle

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.

Binnacle is a set of bridge instruments for merchant marine deck officers. Thirteen tools, most of them working with no signal, and none of them pretending to be more certain than it is. ON WATCH • Navigational warnings, plotted. NAVAREA and the coastal services drawn on a chart where they actually are, instead of read as a wall of text at three in the morning. Set a radius from your position and follow only the services that concern the passage. • Weather for a position and a time you choose — wind in forces, the barometric tendency, fog risk. Forecast data from MET Norway. • True wind from course, speed and apparent wind. • Manoeuvring board — CPA and TCPA for two to five contacts at once, and one alteration that clears all of them. POSITION AND CHECKS • Compass error by amplitude or azimuth, worked against celestial data for the moment you observed. • Celestial fix — reduce two or three sights and see the cocked hat plotted, with its residuals, not just a number. • ETA and passage timing in UTC, with the arithmetic shown. • Heel, trim and roll period from the phone's own sensors, with GM estimated from the roll period. RECORDS AND REFERENCE • Log book for bridge events, kept for the whole contract and handed over as a PDF. • 17,998 ports by UN/LOCODE, and 11,728 port facilities with their GISIS codes, searchable by name or code — the reference is bundled, so it works alongside. • Manoeuvring miles — passage legs with sea and manoeuvring totals kept apart. • Unit converter for the units a bridge actually uses: knots, cables, fathoms, hectopascals, tonnes and the rest. WHAT IT WILL NOT DO It is an aid, not an authority. It does not replace corrected charts, official publications, the ship's procedures or the officer's judgement. Every screen states its own limits rather than hiding them, and every export says on its face what it is. WHAT STAYS FREE True wind, ETA, compass error, the manoeuvring board, heel and trim, weather and the unit converter are free, with no limit and no trial. The log book keeps ten entries free. Celestial reduces one sight free. Port search and the match count are free. ONE PURCHASE, NOT A SUBSCRIPTION • Navigational warnings — NAVAREA and the coastal services, with the chart and the radius • The facility's own record in Port Facilities • Fixes from two or three lines of position, and the plot • PDF export, on every screen including the free ones One payment of $5.99 unlocks all of it, on every device signed in to your Apple Account. There is no subscription, nothing renews, and there is nothing to cancel. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy and Terms are also in the app, under More.