[Milsurplus] LO radiation

[b. smith]

With a weak signal it is much easier and faster to obtain an aural null. 
If the operator were  using a direct driven  manual antenna that utilized an 
"Arm Strong
Rotator"(steering wheel) without gears and cables, the null could be 
obtained in seconds.
Granted the "weak signal" correct bearing would be broad , say 20 to thirty 
degress but close enough to get you started in the correct direction and to 
get you in visual range. Signal varying with the square of the distance. If 
the signal strength  picked up the operator had the correct bearing, signal 
weakens then reverse direction.
Starting with an assumed over the horizon signal(it must be over the horizon 
or you would not be going through this DF drill) Each participant could see 
the tops of the vessel approximately  7 or 8 miles ( and I will not quibble 
over the difference between the statue mile and a nautical mile which is 
approx 800 feet) So the idea is to get within 14 to 16 miles  for visual 
sighting on a smooth sea and no restrictions to visibility. Then the fun 
begins.

breck k4che