Arc dip

[T-topflyer]

Very possible for the rotor arc to dip to such extremes. With the H-60 it can dip as low as 4 feet from the deck in certain situations.
Which is why the aircrew are so serious about exiting the arc at the 3 and 9 o'clock positions.

 

[T-topflyer]

Whoops. Please reference the "Whoops" thread. Too fast hitting the buttons. Disregard.