An unrelated question for you - I'm using the B1900d to test my GPS
> changes, since it has the best GPS setup that I can find - I'm a  
> little surprised by the way CDI deviation is handled - I was led to  
> believe that in normal VOR mode, one 'dot' of CDI deviation usually  
> corresponded to 1nm, but in the B1900d, one dot seems to correspond to  
> 2.5nm (full deviation being 5nm). Is this intentional?
>   
Ok , I did some test flights , now I see what you mean ....
With the EFS 40/50 the deviation scale units depend on the  navigation 
source:

VOR/TAC  1 dot = 5 degrees
ADF                     7.5 degrees
LNAV or RNAV     2.5 NM
LNAV/RNAV appr  0.625 NM
GPS ENROUTE     2.5    NM
GPS TERMINAL   0.5   NM
GPS APPROACH    0.15 NM

Hope that helps , I'm going over the animations again to see if I got 
the scale right.
Cheers

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