HelloAt a thread titled GeoCalcAzimuth 1/2-DME dated 26-27 November 2008 ,mention was made to an example of how to use Azimuth calcs , and a link was provided.I have been unable to get the link to work .Could anyone help to provide the contents of that link.I am trying to create a TFR instrument for my F-111 panel .Assistance would be greatly appreciated .RegardsCobs

Cobs, I tried finding the link too. Couldn't find. Anyhow I believe that AZIMUTH may not be the keyword that you were hoping. In GeoCalc there is a function where when you have a given LAT/LON, a RADIAL(AZIMUTH), and a distance, plug those into the GeoCalc function of the GPS and it will return another LAT/LON. Same as WPT/BRG/DIS entry in a FMC. ( GRB060/10)Roman

Unfortunately, since the hack last year resulted in the entire message base archives needing to be reindexed, it is impossible to find threads that only contained the results of a Search link...I too spent about two hours attempting to relocate the linked post, but without knowing at least a few of the keywords in the post on which to search, it has been a fruitless exercise......although I did manage to revisit some rather interesting threads during the exercise. ;)

Not sure how much of a help this would be, be here are some very useful aviation formulas complied in the Aviation Formulary V.144.Using the formulas you can derive a bunch of GeoCalc figures etc, sounds like what you're looking for but I'm not sure.Engjell BerishaGood Day!

Thank you for your efforts and comments .What you have provided gives me a starting point . I downloaded the formulas and will look in there .Basically at this stage I would prefer to avoid Simmconnect .Seperate of the above , the TFR requires descent down to the clearance plane by initially 10 degree and then 12 degreedive . At higher speed that necessitates a VSI greater than 9900 FPM from the autopilot .Has this been done before , I presume autopilot VSI greater than 9900 is possible , but as yet have not tackled that problem ?RegardsKarol