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ezAlmanac 1980's for Training is offered as a low cost resource to use for celestial navigation training. This version provides immediate access to Nautical Almanac Years 1980-1989, the supporting Nautical Almanac tables, and all 6 volumes of HO-229 Sight Reduction tables. The 1980's are used in celestial navigation training programs including USCG and US Navy. The year 1973 is also provided to support the pre-loaded sight reduction example from the included HO-229 introduction.

In-App purchases can be used to add additional almanac years, or purchase a full unlock to upgrade it to the equivalent of ezAlmanac Pro.

NEW FEATURE - We want to help you make the step from using the app to finding your fix by hand. You can now print blank sight reduction and plotting forms right from the app. In addition, when you export sight data from the app it is now displayed on the plotting and sight reduction forms to show you how it is done.

Celestial navigation has never been easier! With ezAlmanac and a sextant you will be finding your fix like a pro in no time! ezAlmanac will help you perform celestial navigation exactly as it has been done for over 100 years. It produces all Nautical Almanac (1961-2059) and Pub. 229 tables exactly as you are used to seeing them in the printed form. All tables can be accessed directly for manual usage if you choose to do so. Since they are produced by the software they support zooming and panning, and you can highlight in the tables to easily find the values you are looking for.

Most users, however, will prefer to let ezAlmanac do all of the work. Simply enter the basic sight parameters, make and enter your observations, and ezAlmanac will do the rest. It performs all of the steps to correct your observation, find GP of the object, do the sight reduction, and plot the LOP. No steps are skipped and all details are shown. Drag the marker to where the LOPs cross in the plot and you have found your fix!

Celestial navigation instructors love ezAlmanac. Values obtained from the Nautical Almanac and Pub. 229 are clearly identified on a button. When you press the button you are taken to the page that has that value with the row, column and value highlighted. Even when ezAlmanac is doing all the work, it can teach you how to do it manually using the books!

ezAlmanac performs all astronomical calculations using the NOVAS 3.1 software from the US Naval Observatory (USNO) and a JPL ephemeris that covers the years 1961 through 2059. Since all calculations are performed in the software, ezAlmanac is fully functional with no dependency on the internet.

Additional features:

- Ability to export almanac pages to a PDF file for use outside the app
- Interface with Dropbox to export sight data or pages
- Compass check using celestial body
- Rhumb line and great circle route calculations

Please check out www.ezCelestial.com for a full description of the application and in-app help pages.

iOS Store Category:

Primary: Navigation

Secondary: Reference

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Version History

Launched Mar 02, 2012 (over 8 years ago).

Releasing new versions every about 2 months, on average.

Jan 11
Version 3.0.5

- Fixed crash when nautical time zone value field is empty
- Updated promo page for Practical Navigation Illustrated book
- Updated Nautical Almanac bookstore for 2016/2017 current years

Nov 03
Version 3.0.4

- Minor changes for new iOS release
- Added ability to save and plot Polaris sights.
- Fixed issue with Az calculation when Hc is negative

Sep 10
Version 3.0.3

- Added Nautical Almanac Year 1981 to this version
- Minor user interface improvements and refresh
- Added additional In-App Help pages, refresh of others
- Support for entering nautical time zone character

Jul 31
Version 3.0.2

- Updated in-app purchase screen to show prices of each item with correct localized currency
- Removed pop-up help notifications

Jul 06
Version 3.0.1

- Added new export function to support printing sections of the Nautical Almanac pages to use as a backup on a passage.
- Updated format used when displaying a date on the expert screens from mm/dd/yyyy to dd mmm yyyy.
- Fixed memory leak that occurred when a newly generated almanac page was saved to persistent data.

May 10
Version 3.0.0

- Added in-app purchase of selected almanac years
- Added ability to graph your observations against a predicted value
- Added ability to print pages with AirPrint or save to PDF file
- Fixes bug in the computation of "v" value on transition to daylight savings time.
- Fixed rounding error in Ho229 table generation.

Feb 28
Version 2.0.6

- Corrects bug in restoring saved almanac pages when app is shut down and restarted.
- Minor accuracy improvements when interpolating GHA, Dec, and Hc.

Feb 02
Version 2.0.5

- Added capability to export sight data to a text file
- Added Dropbox support for file export function
- Can now export KML to display your sight reductions on Google Earth
- Added capability to highlight row/column in tables by dragging a finger
- Added capability to automatically sync the shoot time with atomic clock
- Corrected lat/lon scaling on the plot on the sight reduction screen
- Added 2 zoom levels on the plot on the sight reduction screen
- Now shows a before and after LOP when a LOP is projected for a running fix

Nov 25
Version 2.0.4

Fix crash when running under iOS 7
Resolved issues with saving sight data
Minor user interface changes

Nov 06
Version 2.0.3

New color scheme for indoor use.

Fixes crash that can occur for certain country localizations.

Sep 18
Version 2.0.2

Bug Fix - LOPs advanced for running fix on the Sight Reduction screen were not advanced when displayed on the full map.

Jul 27
Version 2.0.1

- Added sample of "Practical Navigation" book
- Fixed minor bug affecting sign of Hc in sight reduction

Jul 16
Version 2.0.0

- Updated user interface
- Added night mode capability
- LOPs can now be displayed on a map
- Increased number of saved observations to 100
- Added "Shoot" function to aid in making observations
- Enhanced star map now shows Hc and Az for all objects
- Added help pages for all functions
- Added PDF of introduction section of HO-229

Nov 25
Version 1.1.14

Fix button highlighting bug on expert screen

Nov 13
Version 1.1.13

Minor bug fix.

Aug 19
Version 1.1.12

- Reworked Polaris Table calculations. Data is now spot-on with the official USNO Nautical Almanac.

Aug 02
Version 1.1.11

- Updated daily data calculations. Now almost exactly matches published Nautical Almanac!
- Updated leap second calculation to support leap seconds back to 1961.
- Now supports ACCURATE generation of Nautical Almanac pages back as far as 1961.
- Fixed incorrect starmap background shading that can occur at latitudes where the sun never rises or the sun never sets.

Jul 26
Version 1.1.10

- Update For latest Bulletin B actuals through 6/2013 and predictions through 7/2014.
- Minor bug corrections

May 31
Version 1.1.9

- Added functions to calculate rhumb line and great circle tracks, distances, and ETA
- Added support for sights on the center of sun and moon
- Made improvements in the compass check function when using an observed bearing.
- Added ability to specify either the time zone or a time correction to determine UT.
- Minor bug corrections

Apr 05
Version 1.1.8

Enhanced compass check functionality to support Gryo checks and using an observed bearing.

Minor bug fixes.

Jan 17
Version 1.1.7

- Updated internal earth orientation data with final values through 2012 and latest predictions for 2013.
- Added Polaris Tables and Expert Function
- Added Sun True Bearing tables and Compass Check Expert
- Improved Expert function integration with star map.
- Minor bug fixes

Nov 20
Version 1.1.6

- Added interpolation table highlighting and calculation
- Fixed bug where selecting a new object from the star map incorrectly caused the data with the new object to be saved.

Nov 13
Version 1.1.5

Minor bug corrections.

Oct 04
Version 1.1.4

- Added Arc toTime Conversion Table
- Added Tables for Interpolating Sunrise, Moonrise, Etc.
- Minor bug corrections

Sep 10
Version 1.1.3

- Added animated star map. Shows current position of objects at the location day and time set on the expert page. Map can be animated to show movement during the selected day. Object to observe can be selected by touching it on the star map.
- Updated IERS earth orientation data to the actual values through 8/2012 and most recent predictions for 9/2012 through 8/2013.
- Added IERS earth orientation data for the years 1973-1990. ezAlmanac now supports Nautical Almanac page generation for the years 1973-2059.
- Added "Easter Egg" to unlock the generation of Nautical Almanac pages for the years 1940-1973. Since there is no earth orientation data or accurate leap second information, these pages may not match the published Almanacs, but should be within ~0.5 minutes of the published values. If you have trouble finding the easter egg, send an email to support@ezcelestial.com.

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