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   Radius of Action
   Returning to Alternate Base
  Beyond your average e6b:
Visualize results of radius of actions calculations
Radius of Action Returning to Alternate Base
  Problems with Flash? Please also see:
     Enabling / Unblocking Flash in Different Browsers & Compatible Browsers

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

This program calculates the distance (radius of action) and necessary headings and time to fly before having to return to an alternate base that is at a certain distance and bearing from the 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 the Same Base
  Radius of Action - Returning to Moving Base
  Radius of Action - Returning to Moving Alternate Base


 Enabling / Unblocking Flash in Different Browsers

Firefox BrowserFirefox unblocking procedure
on Windows PC desktops and laptops)

Chrome BrowserChrome unblocking procedure
on Apple Mac desktopts and laptops. Performance on Windows PCs is mixed, many users report the simulators are slowed too much.

Explorer BrowserExplorer
Issues: Slow performance on some computers, but worth a try if Chrome isn't working well.

Opera BrowserOpera unblocking procedure
Issues: Cripplingly slow performance on many computers

Firefox BrowserEdge unblocking procedure
Issues: Cripplingly slow performance.

Firefox BrowserSafari unblocking procedure
Issues: Keyboard control not working

Click here to find out what all the fuss is about and what is going on with Flash!
* As of this update. The situation is always changing. Experimenting with different browsers is always recommended.
IMPORTANT NOTE FOR MOBILE DEVICES AND TABLETS: This website and the simulators are designed for desktop fast laptop computers. Most Apple IOS devices do NOT support Flash.

If you do not have the latest version of flash you may visit www.adobe.com and go to the downloads section for the latest plugin version or go via the direct link: http://www.adobe.com/go/getflashplayer.









  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.

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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.