NavList:

ABSOLUTELY FRANK!!!!!!!

I purchased your ap quite awhile ago but I never got around to giving it a "go" until abour four months ago. Once a month I attend a meeting of the "Quiet Birdmen" professional aviators meetings in Ventura California which is right on the beach. So, recently, I have been taking some of my sextants with me each time and arrive early so as to take observation from the beach. You can "rap put" observations in quick sucession making it extremely easy to take many observations in just a few minutes. I don't even write down the information, I just leave my cellphone on to record my spoken readings of the time and sextant readings and do a "screenshot" of the information displayed on the ap. You get virtually instant "feedback" on the accuracy of your sextant work!  Then, since you have recorded the information, you can use it to practice conventional sight reductions when you get home!

The methodolgy you implimented is the same as that used by flight navigators by applying the usual "corrections" to the computed altitude, with the signs reversed, rather than waiting til after the observations to apply the "corrections" to "sextant altitudes."  Flight navigators use this technique since they need instant iresults.

On a different subject, several years ago you posted a method to accurately determine the index correction for your sextant with the use of a tripod and a more powrerful telescopy placed behind the sextant. I used your method that many years go to adjust the I. C. to zero on my Tamaya. Guess what, it has remained at "zero" ever since! How about rreposting that information for the new guys.

gl