Page 28 - Radiooperatørkursus BEG_Neat

Here is an explanation of what it is all about.

3.2 The transponder

The transponder is a device that sits in the aircraft. In the school plane, they look

like the picture here:

The purpose of the transponder is to:

- Provide information to the air traffic service about where we are, who we

are and what altitude we are flying at

- Provide information to other aircraft about our position and altitude

- Allow us to send signals in case of radio failure, emergency or hijacking

As a radio operator, you may be asked to operate the transponder, so it is

important that you familiarize yourself with how it works and how to operate it.

Here is the display of an old-fashioned

primary radar screen.

There are quite a few planes in the air, they

are shown as white spots. One of the white

spots, the one with a red ring around it, might

be our plane, OY-TLA. It's located southeast of

downtown in the radar, but Tower can't be

completely sure.

Side 28 af 45