"Gary Drescher" wrote in
:

"Peter R." wrote in message
...
Yup. Fortunately, there are at least five ways for an instrument
pilot to detect that problem before it's too late: 1) double-check the
NAV/GPS switch; 2) observe the flag on the GS; 3) the GS needle should
start high and then come to center when approaching the FAF; 4) even
when established on the GS, a needle that stays perfectly centered at
all times should arouse suspicion; 5) a low-altitude alert should
certainly call attention to the problem.

--Gary

In this case there should have been a sixth way - the instructor sitting
right seat...