Compute the + 17 dBu contour as follows:
(a) Determine the effective antenna height above mean sea level according to the procedures in Sec. Sec. 80.757-80.761.
(b) Determine the effective radiated power according to Sec. 80,765. Determine for each radial the distance from the antenna site to the + 17 dBu point of field strength using procedures of Sec. Sec. 80.765 and 80.767.
(c) Plot on a suitable map each point of + 17 dBu field strength for all radials and draw the contour by connecting the adjacent points by a smooth curve.