Since Gurkhas come as standard 5` tall,with a grin to match,you have 3 of them standing with red filament shielded torches spaced 4-5 yards laterally and facing the approaching helo;approach angle is determined by lining up heads above any trees from a point 25-30 feet behind*, with the other 2 on the ground ,facing in the opposite direction,but torches facing the approach path.During the approach,you fly the `reds`,ie if they go above the whites you are low,so climb,and v-v.If all the lights go out,scoot,the LZ is hot,or you`ve landed in the trees....
* Geometrically it`s the 1-in -60 rule to determine approach angle....
Anyway,you know you`ve arrived safely,as there are all these rows of shining teeth,and shouts of `punkah-wallah sahib is here with the rum`..