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

Request the aircraft to report amount of correction needed.
d. Request pilot evaluation of pattern computations
after one or two legs.
e. Obtain radar range of vessel from aircraft when
aircraft turns inbound if vessel has no information.
f. Plot radar fixes of the aircraft directly on the air
plot, and then keep aircraft corrected to track by use of the
relative motion pattern.
g. Adjust times and headings if necessary. If other
than minor changes are necessary, recheck wind, TAS, and
computations, and replot the relative motion pattern (bowtie).
h. Replot bowtie only when the aircraft is overhead.
2. CSR computation sheets. It is recommended that ships which
normally serve as SAR vessels prepare computation sheets for
CIC in order to efficiently preplan for the air/surface
coordinated search. The sheet requires that search data be
recorded in a logical order and computed in the proper
sequence, and that initial advisories are readied for delivery
to arriving aircraft.
3. Aircraft advisories
a. Before the aircraft arrives on scene for a
coordinated ship/air search, the ship should prepare several
advisories for the aircraft, including "search information,"
"correction to course," "searchlegs," "crosslegs," and similar
advisories needed for efficient execution of coordinated
searches. All instructional types of advisories are passed to
the aircraft before starting the search pattern, if possible.
Directive advisories are passed to the aircraft as required
during the search.
b. In order to give "off course" advisories to the
aircraft as soon as the search pattern is begun, the vessel
should furnish the aircraft with the "Correction to Course
Table" for its search TAS (Table E-1) together with a brief
explanation of its use, prior to starting the pattern.
c. The distance off course is given in quarter mile
increments and should be based on the average of several
plotted fixes. Upon being advised it is off course, the
aircraft corrects back to course by turning the number of
degrees
E-8