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   Radius of Action
  Returning to the Same Base
  Beyond your average e6b:
Visualize results of radius of actions calculations
Radius of Action Returning to the Same Base
  This site now uses a Flash emulator called Ruffle. In some browsers you may need to click the triangle play icon or the unmute icon for the app to start. Most of the functionality of the original Flash is working, however there are some issues, such as minor visual differences. As the Ruffle emulator continues to improve, hopefully these issues will resolve in time. Thanks for your patience and for using our site. By using the site you are agreeing to the following disclaimer (click to view). Note: NOT COMPATIBLE WITH iPad or iPhone.  

 Tip: Press F11 if you need to toggle full-screen on/off to view this page better in your browser. F11 works in Microsoft Edge, Firefox and Opera.

This program calculates the distance (radius of action), the necessary headings and time to fly before having to return to the same fixed base of departure given wind conditions and the fuel time available.

Note: Radius of Action Calculations are also known as Point of Safe Return Calculations (PSR).

Input data in the white colored fields in the desired unit column and press "Calculate". Results will then be displayed along with a visual representation. If inputs are invalid then no results or visual representations will be displayed.

For a random example click on "Test" and then "Calculate". You may click "Test" as many times as you wish to generate an infinite amount of examples.

To clear all fields press "Reset".

See also:
  Intercepting Moving Target  
  Radius of Action - Returning to Alternate Base
  Radius of Action - Returning to Moving Base
  Radius of Action - Returning to Moving Alternate Base























  Navigation Simulator
Practice in our simulator specifically designed for learning the basics of instrument navigation. Try the Navigation Simulator, available for Windows. Free to try fully functional version for 10 days, $39.95 to buy. Note: this simulator has its own self-contained Flash so it works without Flash being installed and is not subject to the Adobe Flash discontnuation / end of life.


Units and Abbreviations
Length or Distance
Nm -  nautical miles
km -  kilometers
sm -  statute miles
knots -  knots (Nm/h)
km/h -  kilometers per hour
sm/h -  statute miles per hour
h or hr(s) -  hour(s)
m or min(s) -  minute(s)
s or sec(s) -  second(s)
o degrees 


All rights reserved to Luiz Roberto Monteiro de Oliveira.  No content or code of this web site may be reproduced without prior permission from the author.