JP 3-50 National Search and Rescue Manual Vol I - US Navy

d. If the other relocation methods cannot be
accomplished after signal release, the pilot can use the
standard pattern (see Figure 6-19) by noting and maintaining
heading, altitude, airspeed, and time. Fifteen seconds after
the first signal is dropped, a second is dropped. The pilot
then makes a procedure turn to the right, adjusting the final
portions of the turn to roll out on a heading that will allow
the aircraft to line up with and fly directly over the two
signals. When the aircraft is over the first signal, a smoke
and illumination signal of approximately 45 minutes duration
is dropped, hopefully close to target position. If a delay of
"X" seconds was involved from the first sighting until the
first signal ejection, an equal amount of time is delayed
after passing back over the signal before ejecting the
45-minute signal. If the target is not resighted, the pilot
continues for 30 seconds and drops another 15-minute signal.
Parallel sweeps to the line of markers are then made until the
target is relocated.
e. A major factor to consider in planning and conducting
sensor searches is the means that will be used to identify
contacts of interest. While some electronic sensors, such as
FLIR and low-light-level television, may enable the operator
to identify targets in real time, other sensors, such as radio
and radar, cannot provide identification unless the target is
equipped with a coded signal.
6-20