ADI DH REF

[dr_anthony]

If i set on ADI DN REF different alt (for example 200 ft and 300 ft) the GPWS minimums callout heard twice. That should do PF and PNF on this situation? PNF should set his DH REF similar with PF DH, or maybe should set it to -20? Thanks.

[Litjan]

The DH should always be set to the same value - after all it is just one aircraft doing one approach that only has one DH .

The DH is only used for CAT II and CAT IIIa approaches - so they should be set to the value specified in the approach charts for CAT II (usually around 100) or to 50´ for CAT IIIa autoland approaches.

For all other approaches, set both to -20.

Jan

 

[dr_anthony]

Great! Thanks.