What is an altimeter?

It is a device that planes use to tell you  are flying at different altitudes. Though smaller planes often use maybe air pressure outside the plane to tell what altitude they are  at, in bigger planes likely they use sending signals and bouncing these signals off the ground. But, 5G interferes with these signals especially around the airports of the biggest cities. So, if you are flying in a cloud when the plane cannot see the ground you might crash because of 5G towers or nodes when you are landing or taking off.

By the way if you live out in the country away from any 5G towers is the safest place to be so you won't get ill from any 5G towers or nodes. You don't want a node or tower outside your apartment window unless you want to be in the hospital soon with Covid or other problems like leucemia or other cancers. 

In 1989 I soloed in a Cessna 152 small airplane and in order to learn to fly by yourself you have to also learn about altimeters which show your altitude. If you have VFR Visual Flight rules you can see the ground but where it becomes dangerous regarding 5G is when you are flying IFR which is Instrument Flight rules when you cannot see the ground at all while flying through fog or clouds. This is when 5 G might make your plane crash because of sending the wrong altitude to a passenger plane and the plane could crash. Mostly you would crash while taking off or landing flying IFR.

You might think that aircraft controllers might prevent airplane crashes. However, their job is not this at present. Their job is to prevent planes from crashing into each other rather than crashing into the ground or mountains or hills. It's primarily the pilots job to avoid crashing into the ground or hills or mountains even when flying inside fog or clouds.

So, now you can better see the problem of 5G regarding not crashing passenger planes or small planes flying IFR in and around larger cities and trying to take off and land at major airports in cities around the world.