2. Search Patterns BMCS WOLFSON HEH! I’M OVER HERE !!!

3. Nomenclature Major Axis TWC LW Datum SP

4. Nomenclature Minor Axis Major Axis TWC LW Datum SP

5. Nomenclature Minor Axis Major Axis Commence Search Point ( CSP ) TWC LW Datum SP

6. Nomenclature Minor Axis Major Axis (CSP) Plotted 1/2 Track space from corner! TWC LW Datum SP

7. Nomenclature Minor Axis MajorAxis CSP Search Leg

8. Nomenclature Major Axis CSP Cross leg Cross leg will be equal to 1 whole track space! Minor Axis

9. Nomenclature CSP Track space

10. Nomenclature CSP Direction of Creep N S E W

11. Search Pattern Designations First letter: Pattern Type P Parallel track V Sector C Creeping line B Barrier S Square T Trackline

12. Search Pattern Designations Second letter: Number of Search Units S Single unit M Multi-unit

13. Search Pattern Designations Third Letter: Supplementary Information N Non return L LORAN R Return or C Coordinated Radar or circle S Spiral d Drift A Aural compensated

14. Which Search Pattern do I use? Trackline Parallel Creeping line Sector

15. Ask yourself what is.... v datum v search object v search area v search units v on scene weather v probability of detection v datum v search object v search area v search units v on scene weather v probability of detection

16. Trackline Search: Criteria: v v Search object’s intended track is the only information available. v Rapid coverage of the search object’s proposed track is obtainable. v Usually the first physical search for a missing or overdue craft.

17. Trackline Search: Execution: v v For patterns with an odd number of legs, CSP is at one end of the trackline. v For patterns with an even number of legs CSP is offset 1/2 track space to either side.

18. Trackline Search: A B TSN Single Unit Non-Return

19. AB TSR Single Unit Return CSP Trackline Search:

20. Destination Drifted Trackline Origin Trackline Search:

21. Single Unit Return CSP TSR 1/2 S Trackline Search:

22. Parallel Search Criteria: v Used to cover large search areas. v Provides uniform coverage. v Usually the best pattern when using more than one search unit. Execution: v Search legs are parallel to the major axis. Criteria: v Used to cover large search areas. v Provides uniform coverage. v Usually the best pattern when using more than one search unit. Execution: v Search legs are parallel to the major axis.

23. Parallel Search Single Unit (PS) CSP

24. Parallel Search Multi-Unit (PM)

25. CSP A-1 A-2 Parallel Search Single Unit (PS)

26. Creeping Line Search Criteria: Provides uniform coverage of the search area. Higher probability that the search object is at one end of the area than the other.

27. Creeping Line Search Single Unit (CS) CSP

28. Creeping Line Search Multi-Unit (CM) CSP

29. Creeping Line Search Single Unit (CSC) CSP

30. Expanding Square Search (SS) Criteria: vMust have a good datum. vUsed in small search areas. vProvides uniform coverage.

31. Expanding Square Search Execution: vCSP is at datum vFirst leg is down drift vAll turns are 90 degrees to the right vSearch leg length is increased by one track space on every other leg.

32. Expanding SquarePattern (SS) 1 S 1 2 2 3 3 4 4 5

33. 1 2 2 3 3 6 NM Search Radius / 144 SQ. NM SS, 1 NM, 12KTS Expanding SquarePattern (SS)

34. Criteria: vMust have good a datum. vUsed in small search areas. vSmall search objects Sector Search

35. Execution: vCSP is at datum. vFirst leg is down drift vAll turns are 120 degrees to the right.

36. Sector Search Single Unit (VS)

37. Sector Search Initial search track spacing: see page 2-F-3, Table 2-3 CG ADDENDUM Track spacing (S) is equal to the radius.

38. Second Search: Off set 30 degrees to the right First search CSP Sector Search Single Unit (VS)

39. Barrier Search Criteria: Used where strong currents exist.

40. Barrier Search Execution: vMajor axis is perpendicular to the direction of drift. vThe SRU runs back and forth along the “down current “ end of the search area.

41. Distress Position Current Barrier Search X

42. Distress Position Current X SRU

43. ANY QUESTIONS? SAR PATTERNS