StarPilot 3.0.7 - App Store

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About StarPilot

The state-of-the-art solution to navigation computations on your iPhone or iPod touch. StarPilot does celestial sight reductions of all bodies using high-precision internal almanac, plus mathematical and graphic solutions...

The state-of-the-art solution to navigation computations on your iPhone or iPod touch. StarPilot does celestial sight reductions of all bodies using high-precision internal almanac, plus mathematical and graphic solutions for position fixes, great circle, rhumb line, traverse and composite sailings, all current problems, piloting solutions, and much more...including lunar distance method of finding GMT from the sky and a unique graphical Sight Planner, and the new Sight Analyzer function that helps you get the most accurate results from a series of sights. The StarPilot is the self sufficient state of the art solution to ocean navigation, fully up-gradeable with free upgrades available via Internet download, easy to use operation from logical menu lists, plus illustrated context sensitive help with practice exercises. The StarPilot requires no external resources to complete its computations. Internet access is not required to use this program or to access any of its help files. General program design features... that save time, keystrokes, and minimize errors - Easy to use menu-driven interface - Stored settings of commonly used values - All bodies and star names stored internally, no need for separate lists - DR functions integrated with the celestial functions - Convenient DR updating by log or time - Input courses as true or magnetic - Convenient time input, with or without zone description and watch error - Graphing calculator plots LOPS, Fixes, DR positions, and Star maps - Program can be easily updated to incorporate latest version and features - Custom menu bar for quick navigation to often-used functions Sight Planning - Sunrise, Sunset, times and bearings (amplitudes) - LAN, time, Equation of time, Hs max at LAN1 - Nautical and Civil twilight times, and LHA Aries at midpoint between them - Moonrise, Moonset, Moon phase, and Moon age - Precompute specific values of Hc and Zn for any body - Planet and Star ID by observed height and bearing - SIGHT PLANNER function plots full sky showing moon, stars, and planets in Radar-like display of heights and bearings. Set Hc min/max and max number of stars before computation. Set cursor and click to read the actual height and bearing of a plotted body. - Special fast almanac mode allows full sky plot - Display internal list of 173 stars by name, brightness, and location - Unique BEST SIGHTS function selects the optimum triads of sights for any sky Sight Reduction - Optional modes for sequential sights using repeated settings or unrelated individual sights - Perpetual almanac accurate to 2100+ - Historically accurate almanac data to 16th century - Sight reduction of Sun, Moon, Mars, Venus, Jupiter, Saturn... plus Mercury! - Sight Reduction of 173 stars plus Polaris - “Assumed positions” read directly from DR section without extra input - View intercepts (a-values) with or without course and speed corrections - Full input data displayed with results to check for errors - Special center-body mode for artificial horizon data - Dip-short mode for practice at shorelines Celestial Fixes - Unique SIGHT ANALYZER fits a sequence of sights to the right slope for optimum sight selection - All fixes corrected automatically for course and speed as needed - Fix accuracy independent of DR accuracy in all cases - Plots LOPS with live cursor position display - Fix computed by USNO algorithm in the Nautical Almanac - Zoom in on plot to see where computed fix is located - Fix can be obtained by graphic selection from the LOP plot - Automatic display of DR-to-Fix range and bearing - Optional automatic update of DR after fix - Display new course and distance to stored destination

Version History We've fixed a mistake that caused the user-entered settings to fail to save. 3.0.7 03/16/2025 We've fixed a bug that got past us in the last build. Now the sight planner again shows you the names of the objects in the sky! 3.0.6 02/28/2025 We've updated the magnetic deviation model for 2025, and fixed some minor typos and bugs in the app. 3.0.5 02/23/2025 We've been busy fixing bugs and making the app better! 3.0.4 07/12/2021 We've found that in Dark mode the app does not display properly. While we are fixing this problem, we have this build which is always in Light mode. 3.0.3 03/13/2021 We've fixed a display issue where a control's color was the same as the background, fixed some missing icons, and fixed some bugs. 3.0.2 03/12/2021 We've fixed a bug when reviewing sights and using archived sights. 3.0.1 01/28/2021 Updated the world magnetic model to 2020. 3.0.0 09/02/2020 Special Celestial Functions - Latitude and Longitude by Meridian passage - Latitude by Polaris sighting - High precision Azimuth of Polaris for surveying or compass checks - Recover lost GMT using unique Lunar distance analyzer - Compass calibration via sun shadow method or ship's pelorus - Sight reduction by external almanac data bypasses internal almanac for - Literal checking of textbook problems. Route planning utilities - Rhumb line course and distance with automatic comparison to GC - Great circle course and distance - Great circle waypoints - Composite sailing track latitude limited great circle route - Traverse Table computations - DR computations by speed and time or by log readings - Long-distance ETA computes local time and date of arrival, any time zone, any longitude, any date - Distance outputs to 2 decimal places for DGPS comparisons Piloting utilities - Distance off by vertical sextant angle horizon to top - Distance off by vertical sextant angle base to top - Distance off by vertical sextant angle base to horizon - Distance off by two bow angles and distance run - Geographic Range computer - Numerical solutions to running fixes (PC only) - Numerical solutions to 3-point sextant fixes for precision PC piloting Current Sailings - Find COG and SOG from course and speed plus set and drift - Find course to steer to make given COG, given set, drift, and speed - Find set and drift from COG and SOG and course and speed - Find course to steer and speed for given ETA across current Miscellaneous Utilities - Convenient Speed-time-distance computer - Find true wind from apparent wind - Interpolate Tide height between highs and lows - Interpolate Current speed between peak and slack - Compute Magnetic Variation Magnetic Var tables updated for 2015-2020 Compiled agains iOS 9.2 SDK 2.05 02/24/2016 Special Celestial Functions - Latitude and Longitude by Meridian passage - Latitude by Polaris sighting - High precision Azimuth of Polaris for surveying or compass checks - Recover lost GMT using unique Lunar distance analyzer - Compass calibration via sun shadow method or ship's pelorus - Sight reduction by external almanac data bypasses internal almanac for - Literal checking of textbook problems. Route planning utilities - Rhumb line course and distance with automatic comparison to GC - Great circle course and distance - Great circle waypoints - Composite sailing track latitude limited great circle route - Traverse Table computations - DR computations by speed and time or by log readings - Long-distance ETA computes local time and date of arrival, any time zone, any longitude, any date - Distance outputs to 2 decimal places for DGPS comparisons Piloting utilities - Distance off by vertical sextant angle horizon to top - Distance off by vertical sextant angle base to top - Distance off by vertical sextant angle base to horizon - Distance off by two bow angles and distance run - Geographic Range computer - Numerical solutions to running fixes (PC only) - Numerical solutions to 3-point sextant fixes for precision PC piloting Current Sailings - Find COG and SOG from course and speed plus set and drift - Find course to steer to make given COG, given set, drift, and speed - Find set and drift from COG and SOG and course and speed - Find course to steer and speed for given ETA across current Miscellaneous Utilities - Convenient Speed-time-distance computer - Find true wind from apparent wind - Interpolate Tide height between highs and lows - Interpolate Current speed between peak and slack - Compute Magnetic Variation Magnetic Var tables updated for 2015-2020 2.04 01/11/2015 Special Celestial Functions - Latitude and Longitude by Meridian passage - Latitude by Polaris sighting - High precision Azimuth of Polaris for surveying or compass checks - Recover lost GMT using unique Lunar distance analyzer - Compass calibration via sun shadow method or ship's pelorus - Sight reduction by external almanac data bypasses internal almanac for - Literal checking of textbook problems. Route planning utilities - Rhumb line course and distance with automatic comparison to GC - Great circle course and distance - Great circle waypoints - Composite sailing track latitude limited great circle route - Traverse Table computations - DR computations by speed and time or by log readings - Long-distance ETA computes local time and date of arrival, any time zone, any longitude, any date - Distance outputs to 2 decimal places for DGPS comparisons Piloting utilities - Distance off by vertical sextant angle horizon to top - Distance off by vertical sextant angle base to top - Distance off by vertical sextant angle base to horizon - Distance off by two bow angles and distance run - Geographic Range computer - Numerical solutions to running fixes (PC only) - Numerical solutions to 3-point sextant fixes for precision PC piloting Current Sailings - Find COG and SOG from course and speed plus set and drift - Find course to steer to make given COG, given set, drift, and speed - Find set and drift from COG and SOG and course and speed - Find course to steer and speed for given ETA across current Miscellaneous Utilities - Convenient Speed-time-distance computer - Find true wind from apparent wind - Interpolate Tide height between highs and lows - Interpolate Current speed between peak and slack - Compute Magnetic Variation Magnetic Var tables updated for 2015-2020 2.03 10/25/2014 Route planning utilities - Rhumb line course and distance with automatic comparison to GC - Great circle course and distance - Great circle waypoints - Composite sailing track — latitude limited great circle route - Traverse Table computations - DR computations by speed and time or by log readings - Long-distance ETA computes local time and date of arrival, any time zone,any longitude, any date - Distance outputs to 2 decimal places for DGPS comparisons Piloting utilities - Distance off by vertical sextant angle — horizon to top - Distance off by vertical sextant angle — base to top - Distance off by vertical sextant angle — base to horizon - Distance off by two bow angles and distance run - Geographic Range computer Current Sailings - Find COG and SOG — from course and speed plus set and drift - Find course to steer — to make given COG, given set, drift, and speed - Find set and drift — from COG and SOG and course and speed - Find course to steer and speed — for given ETA across current Miscellaneous Utilities - Convenient Speed-time-distance computer - Find true wind from apparent wind - Interpolate Tide height between highs and lows - Interpolate Current speed between peak and slack - Compute Magnetic Variation Checkout StarPilot training videos and reviews here http://www.starpilotllc.com/products/spip.htm Updated for iOS 8. 2.02 10/16/2014 Route planning utilities - Rhumb line course and distance with automatic comparison to GC - Great circle course and distance - Great circle waypoints - Composite sailing track — latitude limited great circle route - Traverse Table computations - DR computations by speed and time or by log readings - Long-distance ETA computes local time and date of arrival, any time zone,any longitude, any date - Distance outputs to 2 decimal places for DGPS comparisons Piloting utilities - Distance off by vertical sextant angle — horizon to top - Distance off by vertical sextant angle — base to top - Distance off by vertical sextant angle — base to horizon - Distance off by two bow angles and distance run - Geographic Range computer Current Sailings - Find COG and SOG — from course and speed plus set and drift - Find course to steer — to make given COG, given set, drift, and speed - Find set and drift — from COG and SOG and course and speed - Find course to steer and speed — for given ETA across current Miscellaneous Utilities - Convenient Speed-time-distance computer - Find true wind from apparent wind - Interpolate Tide height between highs and lows - Interpolate Current speed between peak and slack - Compute Magnetic Variation Checkout StarPilot training videos and reviews here http://www.starpilotllc.com/products/spip.htm Updated for iOS 7. Great Circle computations through Long 0 now continue through where as before would stop at 0. redid layout on input controllers to accommodate older devices with smaller screens. 2.01 01/03/2014 Route planning utilities - Rhumb line course and distance with automatic comparison to GC - Great circle course and distance - Great circle waypoints - Composite sailing track — latitude limited great circle route - Traverse Table computations - DR computations by speed and time or by log readings - Long-distance ETA computes local time and date of arrival, any time zone,any longitude, any date - Distance outputs to 2 decimal places for DGPS comparisons Piloting utilities - Distance off by vertical sextant angle — horizon to top - Distance off by vertical sextant angle — base to top - Distance off by vertical sextant angle — base to horizon - Distance off by two bow angles and distance run - Geographic Range computer Current Sailings - Find COG and SOG — from course and speed plus set and drift - Find course to steer — to make given COG, given set, drift, and speed - Find set and drift — from COG and SOG and course and speed - Find course to steer and speed — for given ETA across current Miscellaneous Utilities - Convenient Speed-time-distance computer - Find true wind from apparent wind - Interpolate Tide height between highs and lows - Interpolate Current speed between peak and slack - Compute Magnetic Variation Checkout StarPilot training videos and reviews here http://www.starpilotllc.com/products/spip.htm Updated for iOS 7. Great Circle computations through Long 0 now continue through where as before would stop at 0. 2.0 01/02/2014 Route planning utilities - Rhumb line course and distance with automatic comparison to GC - Great circle course and distance - Great circle waypoints - Composite sailing track — latitude limited great circle route - Traverse Table computations - DR computations by speed and time or by log readings - Long-distance ETA computes local time and date of arrival, any time zone,any longitude, any date - Distance outputs to 2 decimal places for DGPS comparisons Piloting utilities - Distance off by vertical sextant angle — horizon to top - Distance off by vertical sextant angle — base to top - Distance off by vertical sextant angle — base to horizon - Distance off by two bow angles and distance run - Geographic Range computer Current Sailings - Find COG and SOG — from course and speed plus set and drift - Find course to steer — to make given COG, given set, drift, and speed - Find set and drift — from COG and SOG and course and speed - Find course to steer and speed — for given ETA across current Miscellaneous Utilities - Convenient Speed-time-distance computer - Find true wind from apparent wind - Interpolate Tide height between highs and lows - Interpolate Current speed between peak and slack - Compute Magnetic Variation Checkout StarPilot training videos and reviews here http://www.starpilotllc.com/products/spip.htm Application is now a universal binary compiled for iOS 6 which will take advantage of the larger screen size of the iPad and retina display. The app also works on iPhone 5. Tabs now work on iPhone5 and iPod 5th generation. fixed bug in add times 1.20 12/10/2012 Route planning utilities - Rhumb line course and distance with automatic comparison to GC - Great circle course and distance - Great circle waypoints - Composite sailing track — latitude limited great circle route - Traverse Table computations - DR computations by speed and time or by log readings - Long-distance ETA computes local time and date of arrival, any time zone,any longitude, any date - Distance outputs to 2 decimal places for DGPS comparisons Piloting utilities - Distance off by vertical sextant angle — horizon to top - Distance off by vertical sextant angle — base to top - Distance off by vertical sextant angle — base to horizon - Distance off by two bow angles and distance run - Geographic Range computer Current Sailings - Find COG and SOG — from course and speed plus set and drift - Find course to steer — to make given COG, given set, drift, and speed - Find set and drift — from COG and SOG and course and speed - Find course to steer and speed — for given ETA across current Miscellaneous Utilities - Convenient Speed-time-distance computer - Find true wind from apparent wind - Interpolate Tide height between highs and lows - Interpolate Current speed between peak and slack - Compute Magnetic Variation Checkout StarPilot training videos and reviews here http://www.starpilotllc.com/products/spip.htm Application is now a universal binary compiled for iOS 6 which will take advantage of the larger screen size of the iPad and retina display. The app also works on iPhone 5. A bug was fixed in the add times piloting function where times with seconds larger than 50 seconds were displayed incorrectly. Piloting menu now works again. 1.19 11/07/2012 Route planning utilities - Rhumb line course and distance with automatic comparison to GC - Great circle course and distance - Great circle waypoints - Composite sailing track — latitude limited great circle route - Traverse Table computations - DR computations by speed and time or by log readings - Long-distance ETA computes local time and date of arrival, any time zone,any longitude, any date - Distance outputs to 2 decimal places for DGPS comparisons Piloting utilities - Distance off by vertical sextant angle — horizon to top - Distance off by vertical sextant angle — base to top - Distance off by vertical sextant angle — base to horizon - Distance off by two bow angles and distance run - Geographic Range computer Current Sailings - Find COG and SOG — from course and speed plus set and drift - Find course to steer — to make given COG, given set, drift, and speed - Find set and drift — from COG and SOG and course and speed - Find course to steer and speed — for given ETA across current Miscellaneous Utilities - Convenient Speed-time-distance computer - Find true wind from apparent wind - Interpolate Tide height between highs and lows - Interpolate Current speed between peak and slack - Compute Magnetic Variation Checkout StarPilot training videos and reviews here http://www.starpilotllc.com/products/spip.htm Application is now a universal binary compiled for iOS 6 which will take advantage of the larger screen size of the iPad and retina display. The app also works on iPhone 5. A bug was fixed in the add times piloting function where times with seconds larger than 50 seconds were displayed incorrectly. 1.18 10/24/2012 Route planning utilities - Rhumb line course and distance with automatic comparison to GC - Great circle course and distance - Great circle waypoints - Composite sailing track — latitude limited great circle route - Traverse Table computations - DR computations by speed and time or by log readings - Long-distance ETA computes local time and date of arrival, any time zone,any longitude, any date - Distance outputs to 2 decimal places for DGPS comparisons Piloting utilities - Distance off by vertical sextant angle — horizon to top - Distance off by vertical sextant angle — base to top - Distance off by vertical sextant angle — base to horizon - Distance off by two bow angles and distance run - Geographic Range computer Current Sailings - Find COG and SOG — from course and speed plus set and drift - Find course to steer — to make given COG, given set, drift, and speed - Find set and drift — from COG and SOG and course and speed - Find course to steer and speed — for given ETA across current Miscellaneous Utilities - Convenient Speed-time-distance computer - Find true wind from apparent wind - Interpolate Tide height between highs and lows - Interpolate Current speed between peak and slack - Compute Magnetic Variation Checkout StarPilot training videos and reviews here http://www.starpilotllc.com/products/spip.htm Compiled with iOS 4.3 SDK 1.17 08/09/2011 Route planning utilities - Rhumb line course and distance with automatic comparison to GC - Great circle course and distance - Great circle waypoints - Composite sailing track — latitude limited great circle route - Traverse Table computations - DR computations by speed and time or by log readings - Long-distance ETA computes local time and date of arrival, any time zone,any longitude, any date - Distance outputs to 2 decimal places for DGPS comparisons Piloting utilities - Distance off by vertical sextant angle — horizon to top - Distance off by vertical sextant angle — base to top - Distance off by vertical sextant angle — base to horizon - Distance off by two bow angles and distance run - Geographic Range computer Current Sailings - Find COG and SOG — from course and speed plus set and drift - Find course to steer — to make given COG, given set, drift, and speed - Find set and drift — from COG and SOG and course and speed - Find course to steer and speed — for given ETA across current Miscellaneous Utilities - Convenient Speed-time-distance computer - Find true wind from apparent wind - Interpolate Tide height between highs and lows - Interpolate Current speed between peak and slack - Compute Magnetic Variation Checkout StarPilot training videos and reviews here http://www.starpilotllc.com/products/spip.htm In this version updated for iOS 4.2 and made transition from night/day/gps viewing simpler. 1.16 03/14/2011 Route planning utilities - Rhumb line course and distance with automatic comparison to GC - Great circle course and distance - Great circle waypoints - Composite sailing track — latitude limited great circle route - Traverse Table computations - DR computations by speed and time or by log readings - Long-distance ETA computes local time and date of arrival, any time zone,any longitude, any date - Distance outputs to 2 decimal places for DGPS comparisons Piloting utilities - Distance off by vertical sextant angle — horizon to top - Distance off by vertical sextant angle — base to top - Distance off by vertical sextant angle — base to horizon - Distance off by two bow angles and distance run - Geographic Range computer Current Sailings - Find COG and SOG — from course and speed plus set and drift - Find course to steer — to make given COG, given set, drift, and speed - Find set and drift — from COG and SOG and course and speed - Find course to steer and speed — for given ETA across current Miscellaneous Utilities - Convenient Speed-time-distance computer - Find true wind from apparent wind - Interpolate Tide height between highs and lows - Interpolate Current speed between peak and slack - Compute Magnetic Variation Checkout StarPilot training videos at http://www.starpilotllc.com/videos.htm Read StarPilot reviews here http://criticalalpha.blogspot.com/2010/03/celestial-navigation-with-iphone-touch.html 1.15 10/21/2010 - updated pdf manual to include new features and missing settings section - update html help files to include new features - fixed bug in add times - added nighttime viewing - Magnetic Variation Epoch expanded from 2010-2015 to 2000-2015 - added GPS functionality to fix by computation and to the data entry form. - removed memory leak in fix by computation. - added GPS console to utilities menu - added StarPilot settings bundle with switch to enable/disable GPS 1.14 09/17/2010 StarPilot youtube training videos are now available. http://www.starpilotllc.com/videos.htm This version fixes the following. 1. Error in the 'UT from known position" utility. 1.12 06/02/2010 StarPilot youtube training videos are now available. http://www.starpilotllc.com/videos.htm This version fixes the following. 1. AM/PM Twilight segmented control in sight planner 2. In settings Dest Lon had a N/S designator instead of E/W 3. added the ability to query long at arbitrary lat in the rhumb line computation to aid in transfering rhumb line between charts. 4. updated documentation accordingly. 1.11 04/30/2010 Updated help files Fixed spelling error in one menu A printable version of the StarPilot help file is now available for download from our website at www.starpilotllc.com 1.10 03/16/2010 Fixed a defect in review sights where limb of sun/moon was not being displayed correctly. Moved Hs to top of data entry form to make it easier to enter information when doing consecutive sights. 1.09 03/04/2010

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Previous Versions

Here you can find the changelog of StarPilot since it was posted on our website on 2016-09-28 20:48:09. The latest version is 3.0.7 and it was updated on 2026-06-21 20:49:32. See below the changes in each version.

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