We always correct for slope in our transects (see Tying the Knots), and during the early stages of laying out the VMA baseline at Nam Sa Bi it was my job to measure this parameter with a clinometer (or my eye). Image above shows one of the flatter segments, and I had apparently determined it to be a 10 percent slope, i.e. one knot. Hence, the gesture. I have a strong feeling that I eye-balled this one. [NOTE: Photo by Myint Myint Oo or Sein Dale (thx)].