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Forum: Questions

11th Aug 2017, 17:51

Replies: 9

Transponder modes

Views: 5,432

Posted By chevvron

Mode C info is transmitted from the aircraft...

Mode C info is transmitted from the aircraft based on 1013.2; it is then converted to altitude by the processor in the radar display which must have the correct local QNH input.

Forum: Questions

6th Aug 2017, 04:15

Replies: 9

Transponder modes

Views: 5,432

Posted By chevvron

Main difference is with SSR Mode A, the...

Main difference is with SSR Mode A, the interrogator is on the ground and the aircraft's transponder replies to its interrogation. With DME (trying to remember my 'radar for controllers' course some...

Forum: Questions

6th Aug 2017, 04:08

Replies: 9

Transponder modes

Views: 5,432

Posted By chevvron

In the UK, it doesn't matter what transponder the...

In the UK, it doesn't matter what transponder the aircraft carries, individual radar displays can 'convert' even a Mode A label to the aircraft callsign if it's entered manually and this will...

Forum: Questions

5th Aug 2017, 06:58

Replies: 9

Transponder modes

Views: 5,432

Posted By chevvron

Mode A is the same as IFF Mode 3. At the first...

Mode A is the same as IFF Mode 3. At the first radar unit I trained at, the RAF controllers refered to 'Mode 3 Alpha'.
Don't know what Modes 1 and 2 were, but an 'ident' squawk is the same as...

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