Originally Posted by
thing
While I know that confusers can be wrong, can anyone work this one out?
"You are passing to the right of an NDB on a magnetic track of 170 with 4 degrees of starboard drift. What will the RBI read when exactly at right angles to the to the NDB?"
a. 274
b 284
c 094
d 084
The answer doesn't seem right to me. The answer apparently is 284. I would have said it was 274.
At right angle means 90 deg. So 170 track + 90 deg = 260 plus 4 degrees for the left crab = 264 deg for the RBI to the right. For the other side it would be 170 - 90 = 80 - 4 deg for the crab = 076.
However In the real world the needle will be wiggling between 261 and 267 so with small crab angles like 4 deg when the needle point to the 90 deg chevron on the ADF indicator you are there.
Number of times I have actually had to use a calculation like this in the air since I got my MEIFR in 1987.........ZERO.