During my time at Apple Expo in Toronto, I met Captain R. Sulpizio, an active Canadian commercial pilot. He has developed an ingenius app to help pilots make instant calculations for the minimum descent altitude (MDA) by quickly filling in a few fields. If you’re a pilot, or one in training listen up, as the following will make sense to you. Here’s the app description:
Cold Calc MDA is designed to clearly and simply input the minimum required fields (Elevation, Charted MDA and the reported temperature) to obtain a temperature corrected MDA. Once these three variables have been entered simply touch the background to dismiss the keyboard and your results are immediately calculated for you and your HAA ( Height Above Aerodrome ) and corrected MDA are clearly displayed.
The app automatically checks for input errors such as:
-MDA being lower than the Elevation,
-MDA equals Elevation,
-Either Elevation and/or MDA being omitted etc.
The temperature is input via a slider making it easy to modify the reported temperature without having to type in numbers via a keyboard. These modifications are always displayed in real time.
Once you have set-up your parameters and corrected your MDA the app can be turned off. Should a change occur at your destination airport, turning the app back on will reveal all the previous entered data so only the changes required to be made require entry.
Very Simple, Very Clean & Very Accurate
Scenario example :
You are setting up for an ILS approach. You enter the following data
Elevation : 230 ‘
Charted MDA : 442’
Airport Temperature : -17 c
The app will calculate the :
-Correction to be applied to your MDA &
As you approach the field, the controller advises that the Glide Slope is u/s and the approach has now changed to a “Localizer Only” approach !
You pull out “Cold Calc MDA” app and the only change you require is the “LOC ONLY” charted MDA. You now enter the Loc Only MDA and your new Corrected MDA is immediately displayed in bold large easy to read digits.
As always, this app is not meant to be used as a primary tool, but as an aid to assist in making calculations. Do not rely on this app, as there is also a disclaimer clearly included within the app. Captain Sulpizio claims this is the only app of its kind in the entire App Store, and so far the positive reviews have indicated other pilots have enjoyed it too.
For you pilots out there, you’re in luck because Cold Calc MDA is selling at 50% off as an introductory offer. There is also a free lite version to try before you buy. Click here to download it for $2.99, and let me know what you think!