23
LARGE OBJECTS: (small and large changes that last for many cycles). Drop buoy #1 (for a straight
line reference) as soon as you start getting readings. Continue at same heading; when you lose target
`
on mag, drop buoy #2. Swing boat around and make another pass in the opposite direction. You
should pick up the target once again. When you lose it, drop buoy #3.
NOTE: At this point, you know that the target lies in the center area between buoys #2 and #3, but
you do not know if the target is to the left or to the right. The next series of passes will pinpoint
the target.
After dropping buoy #3, swing the boat around so that you will be making a run that is perpendicular
to the first two runs and cuts through the center area of buoys #2 and #3 (this run should produce very
large changes in the readout). When the mag picks up the target, drop buoy #4 (for a straight line
reference) and continue on course. When you lose the target, drop buoy #5. Swing the boat around
and make a pass in the opposite direction. Once again, you should pick up the target; when you lose
the target, drop buoy #6.
Pull in the mag and drop anchor between buoys #5 and #6.
BOAT
START
1
2
3
4
5
6
LENGTH OF
TOW LINE
SHADED AREA
REPRESENTS THE
DETECTION RANGE FOR
THIS TARGET
