What is Track line search as per IAMSAR ?


  • Normally used when an aircraft or vessel has disappeared without a trace along a known route.
  • Often used as initial search effort due to ease of planning and implementation.
  • Consists of a rapid and reasonably thorough search along intended route of the distressed craft.
  • Search may be along one side of the track line and return in the opposite direction on the other side (TSR).
  • Search may be along the intended track and once on each side, then search facility continues on its way and does not return (TSN).
  • Aircraft are frequently used for TS due to their high speed.

Aircraft search height usually 300 m to 600 m (1,000 ft to 3,000 ft) during daylight or 600 m to 900 m (2,000 ft to 3,000 ft) at night.

In other words  we can understand this as :

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