Maritime Search

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Across
  1. 1. Where you expect to find the search object in perfect conditions
  2. 3. The drift taking into account tide and leeway
  3. 5. I'm the C in TAPSIC
  4. 8. I'm the M in SMEAC
  5. 9. This type of line is not moving fast ahead
  6. 10. Like a creeping line ahead but different (8,5)
  7. 11. I make things drift left or right from my direction
  8. 13. Distance between adjacent search legs
  9. 14. Type of a fishy search
  10. 15. I'm the P in TAPSIC
  11. 16. Likelyhood of Finding (11,2,9)
  12. 19. Like a barrier on the football field
Down
  1. 2. I'm the T in TAPSIC
  2. 4. I'm so SAD (6,4,13)
  3. 6. When the upper limb of the sun is on the horizon
  4. 7. I'm the S in SMEAC
  5. 12. This square gets bigger and bigger
  6. 13. Search pattern well liked by helicopters
  7. 17. Before sunrise and after sunset
  8. 18. This factor is known as C