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Forum: Tech Log

30th Mar 2015, 13:41

Replies: 20

ATC Altitude Readout

Views: 7,076

Posted By DaveReidUK

Mode S EHS (EnHanced Surveillance) isn't a...

Mode S EHS (EnHanced Surveillance) isn't a squitter (ie sent, unsolicited, at regular intervals).

It's a response to an ATC interrogation (like Mode A/C), although some of the content...

Forum: Tech Log

30th Mar 2015, 08:46

Replies: 20

ATC Altitude Readout

Views: 7,076

Posted By DaveReidUK

Are you saying that ATC will explicitly query the...

Are you saying that ATC will explicitly query the FCU Selected Altitude setting with the pilot if it doesn't correspond to the intermediate restrictions on the SID ?

Forum: Tech Log

29th Mar 2015, 21:16

Replies: 20

ATC Altitude Readout

Views: 7,076

Posted By DaveReidUK

Correct, IAS is part of the EHS spec (and there's...

Correct, IAS is part of the EHS spec (and there's provision for it in the ADS-B spec as well, though I've never seen it used in a squitter).

Selected Speed isn't in the EHS or ADS-B specs.

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