[redshawk]

Never been in a helicopter, but it seems to me, visual. ..would he just as important as instruments. ?

[Sans-Culotte]

Never been in a helicopter, but it seems to me, visual. ..would he just as important as instruments. ?

Not in zero visibility, such as in a fog. Even with instruments, an aircraft could easily fly straight into a hill if he doesn't know it is there. They simply should not have flown in such weather.