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DH Call out

Old 15th Nov 2021, 04:46
  #1 (permalink)  
Thread Starter
Join Date: Sep 2010
Location: Northern Victoria
Age: 78
Posts: 26
DH Call out

Have just been watching a video of a Turkish Airlines B 737-800 landing. Just before the minimums call out, there was another call out, " Decision Height " . Have never heard this before. Is this normal, or something that can be added if required.

Cat3508 is offline  
Old 15th Nov 2021, 10:09
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Join Date: Dec 1999
Location: uk
Posts: 796
On our Boeings we get the auto calls ‘Approaching Decision Height’ at 100’ above and ‘Minimums’. This is if a Radalt minima has been selected. If no Radalt minima is set these auto calls don’t happen and PM makes the calls ‘100 above’ and ‘Decide’. Does this help?
deltahotel is offline  
Old 15th Nov 2021, 10:49
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Join Date: Feb 2010
Location: Planet Moo Moo
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Our Boeings are set to call displayed minima as selected on the MCP (Mode Control Panel in the middle just under the glareshield) only if the minima is displayed on the PFD (Primary Flight Display). This applies to Baro and Rad Alt.

The call is '50 Above' followed by 'Decide'. In low visibility it allows the landing pilot to be 'heads out' looking for the required visual references for the approach whilst also making the call to 'continue' or 'Go-Around' at decision height which the pilot flying the approach would then initiate.
Wirbelsturm is offline  
Old 15th Nov 2021, 13:30
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Join Date: Mar 2001
Location: I wouldn't know.
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When i was on 737s they were pin-pogrammed to do an auto call out of "Approaching Minimums" at 100ft above whatever was bugged, and "Minimums" at DH/DA. For no DH landings there was no auto callout, which is why we bugged the CAT I DA on Baro and switched over to RA, that way we still had a triangle at the CAT I DH on the altitude tape which served as a reminder for a decision call at alert height (200ft).
Denti is offline  
Old 17th Nov 2021, 05:50
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Join Date: Sep 2010
Location: Northern Victoria
Age: 78
Posts: 26
Thank you for your interesting and informative replies. Much appreciated
Cat3508 is offline  

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