Table 2-2. Minimum Distances to Typical Obstructions

TM 32-5895-206-10

(6) The site should be as far as possible from tall

trees, buildings, wire fences, power lines, telephone lines, radio

antennas, railroad tracks, sharp ground contours (mountains,

cliffs, and ravines), buried conductors (cables and pipelines),

chimney stacks, water towers, rivers, lakes, streams, or other

obstructions.

(7) Radio waves in the VHF range have very short

wavelengths and bend or reflect off small objects. A radio signal

at 150 megahertz will react with an object a few feet long.

(8) Recommended minimum distances between the

antenna and various obstructions are listed in table 2-2.

Maintaining these distances will reduce errors in df bearings.

Table 2-2. Minimum Distances to Typical Obstructions

Obstruction

Distance to be

maintained

Scattered trees, small single

200 yards

buildings, vehicles

Wire fences (barbed wire, etc.)

300 yards

Buried cables, pipelines, or other

300 yards

conductors, trenches or deep

ditches

2-36