NAM Verbeek 1966 Distances between Drum Area nests. Distances between pole 1 x 2 - 45 step 2 x 3 39 3 x 4 40 Row of old poles 10 steps E. of new poles Distance between pole 4 x 5 28 step Distances between new poles 35 step. Nest b 20 - 87 step from pole 1 ad 4 to pole b 18 between pole 2x3, 20 from pole 2 ad 4 from line of poles p 3 " 3x4, 4 from 3 ad 8 from line b 7 " 3x4, 60 from 3 ad 33 from line p 1 " 4x5, 9 from 5 ad 64 from line b 19 " Land 27 from pole 7 p 9 " 1 ad 50 from pole 11 a 12 " 13x14, 10 from 14 ad 21 from pole line b 8 " 14x15, 14 from 15 ad 1 line with poles p 11 " 14x15, 14 from 15 and 15 from line b 16 " 18x19, 8 from 19 ad 19 from line b 28 " 1 ad 67 from 18 b 17 " 20 x 21, 4 from 21 ad in line a 11 " 22x23, 20 from 22 p 10 " 1 ad 29 from 23 b 14 " 11 x 12, 19 from 12 ad 3 from line b 13 " 1 x 2, 67 from line distance from pole 1 = gas line b 25 between pole 6 a 7, 8 from gas line and between poles p 2 between pole 8 x 9, 50 from poles, 8 from pole 9 p 7 between pole 6 x 7, 56 from poles, 5 from pole 6