All day Friday on CNN, reporter Martin Savage sat inside a flight simulator cockpit for the Boeing 777 airliner and showed viewers just how easy it is to turn off a plane's transponder.

For CNN's continuous coverage Friday on the missing Malaysian flight, a Boeing 777 flight simulator was used to give a perspective of what it may have been like to be in the cockpit the day the plane went missing. Savage appeared on most of the days programming instructing how to turn off the plane's transponder. The transponder is important as it identifies the aircraft on air traffic control and tells the plane's speed and direction. The transponder on the Malaysian flight was switched off about an hour after takeoff and the plane went missing. As of this writing, the plane has still not been found.

Finding out how to turn off a plane's transponder is not hard in this age of the Google search, but CNN wanted to make sure to show exactly how this is done and to show the exact location of the transponder inside an actual cockpit -- over, and over again.

In every instance, Savage repeated that the transponder should never be turned off during flight but said that it is very simple to turn off -- with "just three clicks to the left," it is done.

During Wolf on CNN, Wolf Blitzer was shocked at how easy it is to turn off the transponder. He also mentioned that three of the four 9/11 hijackers turned off the plane's transponder during the attacks. Savage told Blitzer:

The transponder you're talking about is located right here, right next to my knee. And it looks relatively small -- it is -- but it's hugely important to the navigation of the airplane, as you point out.  

The way you would turn it off -- and you would, I stress, never do this while flying in the air, but to turn it off, you would take it and turn this small switch three clicks to the left and boom, you've turned it off. That essentially means this signal is no longer broadcasting, telling the air traffic controllers on the ground who you are, where you are or what you're doing. Doesn't mean you don't show up on radar, you do, you're still a blip, but now you're an unidentifiable blip. 

One other thing I'll show you about the transponder; if you put it back on and if it was a hijack situation, someone's now in the cockpit with a gun to your head, you don't want to use the radio, you can actually send a signal. You reach down, clear this out, you'd enter a code -- this is not that code -- but it could go like this and now you're transmitting an emergency message that everyone on the ground immediately gets, alarm bells, you've been hijacked. The plane is not in your control.