Jacko wrote (quoting Jim Dulin):
The Army teaches helicopter pilots of all American services and many foreign services an apparent brisk walk rate of closure approach that puts every landing, 100% of them, on the numbers every time.
Apparently the stall down method was used by the US Navy long ago (presumably with carrier operations in mind) and the constant speed to the ground/aim short method was taught by the Air Force. I guess the Army had to be different yet again 
