JP 3-50 National Search and Rescue Manual Vol I - US Navy
JP 3-50 National Search and Rescue Manual Vol I - US Navy JP 3-50 National Search and Rescue Manual Vol I - US Navy
Figure E-1. Aircraft SRU Crosslegs 6. Aircraft searching time a. Unless winds are calm or perpendicular to the searchlegs, times for flying the two directions will be different. The searchlegs will usually be designated "downwind" and "upwind". The formula for computing times required to fly one half of each searchleg is given in pars. C3, C4, and C5. b. Times t1, t2, and t3 are given to the aircraft before beginning the pattern. If radar contact with the aircraft is lost during the search, these times may be used to determine time to turn for the aircraft. 7. Pattern timing a. The aircraft and vessel should restart their elapsed time clock or stopwatch every time the aircraft passes over the vessel. The second half of each searchleg is timed by both the aircraft and vessel. When the computed time (t1 or t2) has elapsed, the aircraft should start its turn onto the crossleg. b. In the CSC pattern, the aircraft uses this timing procedure to determine its own time to turn. The vessel may use the timing required for the aircraft to fly from overhead to overhead as a check on the aircraft's completion of full searchlegs on both sides of the vessel. The timing is t1 + t2 + t turning or t1 + t2 + 60 seconds.
c. In the CSR pattern, the actual commencement of the turn onto the crossleg is controlled by the radar/visual plots aboard the vessel. Timing of searchlegs by the vessel provides a backup control if radar fails. The air controller can tell the aircraft when to turn, but this has to be done while simultaneously shifting from the relative plot to the true plot for the information. Therefore, the aircraft should time itself in the event of radar problems aboard the vessel. d. Crossleg timing is executed by the aircraft pilot independently of the vessel. F. Surface plot-true plot 1. General. With known values for vessel course, searchleg length (L), and track spacing (S), the search pattern is laid out on the ship dead reckoning tracer (DRT) before the aircraft arrives on scene. When ready to begin the search, the ship takes position one-half track E-3
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- Page 337 and 338: composed of significant assigned co
- Page 339 and 340: Hydrographic Office. H.O. Pub 100.
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- Page 345 and 346: List of Ship Stations. Geneva, Swit
- Page 347 and 348: 1. POLICY APPENDIX A. NATIONAL SEAR
- Page 349 and 350: use of wire and radio facilities fo
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- Page 353 and 354: maintain liaison with and support e
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- Page 357 and 358: air SAR units, and provide guidance
- Page 359 and 360: far as possible, afford adequate me
- Page 361 and 362: which shall act in close and contin
- Page 363 and 364: established by the Convention on In
- Page 365 and 366: December 12, 1986 Agreement Concern
- Page 367 and 368: outstretched to each side. j. Inver
- Page 369 and 370: Black or white smoke bursts, 10 sec
- Page 371 and 372: Figure C-2. Surface-Air Visual Sign
- Page 373 and 374: Figure C-5. Panel Signals C-5
- Page 375 and 376: to the 26-foot sailboat row to obta
- Page 377 and 378: straightaway length (x) of the cros
- Page 379: These patterns are variations of th
- Page 383 and 384: adjacent to it, are the following:
- Page 385 and 386: d. If the shaded portions of Figure
- Page 387 and 388: 3. Relative motion pattern solution
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c. In the CSR pattern, the actual commencement of the<br />
turn onto the crossleg is controlled by the radar/visual plots<br />
aboard the vessel. Timing of searchlegs by the vessel<br />
provides a backup control if radar fails. The air controller<br />
can tell the aircraft when to turn, but this has to be done<br />
while simultaneously shifting from the relative plot to the<br />
true plot for the information. Therefore, the aircraft should<br />
time itself in the event of radar problems aboard the vessel.<br />
d. Crossleg timing is executed by the aircraft pilot<br />
independently of the vessel.<br />
F. Surface plot-true plot<br />
1. General. With known values for vessel course, searchleg<br />
length (L), <strong>and</strong> track spacing (S), the search pattern is laid<br />
out on the ship dead reckoning tracer (DRT) before the<br />
aircraft arrives on scene. When ready to begin the search,<br />
the ship takes position one-half track<br />
E-3
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