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LH Series L-PER (The older blue homer and the larger H-Antenna)

LH Series L-PER (The older blue homer and the larger H-Antenna). Module 8 of CASARA ELT Training Plan. Training. Must contact JRCC before activating ELT training unit. Give details. Frequency. Location. Time period. Contact Number. Should contact JRCC and advise when finished.

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LH Series L-PER (The older blue homer and the larger H-Antenna)

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  1. LH Series L-PER(The older blue homer and the larger H-Antenna) Module 8 of CASARA ELT Training Plan

  2. Training • Must contact JRCC before activating ELT training unit. • Give details. • Frequency. • Location. • Time period. • Contact Number. • Should contact JRCC and advise when finished.

  3. FUNCTIONAL CHECK The effectiveness of the electronic homer should be confirmed using a hand held radio on the appropriate frequency. PARK AIRCRAFT, VEHICLE IN THE OPEN, AWAY FROM METAL BUILDINGS WARNING! USE OF HIGH-POWER TRANSMITTERS CLOSE TO THE DF ANTENNAE CAN DAMAGE THE UNIT. ELT TESTER SHOULD BE KEPT AT LEAST 50 FEET AWAY FROM THE ANTENNAE WHEN USING TO TEST

  4. Settings For Search • When you are searching for a signal. • The homer must be set on the proper frequency. • 121.5 for Tasking. • 123.1 for Training. • VOLUME & SENSITIVITY towards the “Maximum” range.

  5. ELT –Mode Switch REC MODE TO DETECT AND MEASURE SIGNAL STRENGTH ONLY DF MODE TO FIND DIRECTION OF ELT SIGNAL

  6. Little L-PerHow it works

  7. Little L-PerHow it works • REC Mode • only used for Handheld • Left side arrows on antenna is used • for reference point to find direction of • strongest signal • Needle indicates signal strength • Useful for confirming multiple DF centre

  8. ELT Homer-Meter-REC Mode METER REC MODE MEASURES SIGNAL STRENGTH LEFT-WEAK / RIGHT- STRONG

  9. Little L-Per How it worksREC mode STRONG SIGNAL WEAK SIGNAL METER REC MODE MEASURES SIGNAL STRENGTH ONLY

  10. Little L-Per How it worksREC mode STRONG SIGNAL WEAK SIGNAL METER REC MODE MEASURES SIGNAL STRENGTH ONLY

  11. Little L-Per How it worksREC mode STRONG SIGNAL WEAK SIGNAL METER REC MODE MEASURES SIGNAL STRENGTH ONLY

  12. Little L-Per How it worksREC mode STRONG SIGNAL WEAK SIGNAL METER REC MODE MEASURES SIGNAL STRENGTH ONLY

  13. Little L-Per How it worksREC mode STRONG SIGNAL WEAK SIGNAL METER REC MODE MEASURES SIGNAL STRENGTH ONLY

  14. Little L-Per How it worksREC mode STRONG SIGNAL WEAK SIGNAL METER REC MODE MEASURES SIGNAL STRENGTH ONLY

  15. Little L-Per How it worksREC mode STRONG SIGNAL WEAK SIGNAL METER REC MODE MEASURES SIGNAL STRENGTH ONLY

  16. Little L-Per How it worksREC mode STRONG SIGNAL WEAK SIGNAL METER REC MODE MEASURES SIGNAL STRENGTH ONLY

  17. Little L-Per How it worksREC mode STRONG SIGNAL WEAK SIGNAL Probable target area Mark your coordinates Take bearing Adjust for magnetic variation Draw line on map

  18. Little L-PerHow it works DF Mode Needle points to side with strongest signal. Needle centres with target in front or behind. Functional with very weak signal (you may not hear it). Works well with moving vehicle or aircraft.

  19. ELT Homer-Meter-DF Mode METER DF MODE SHOWS DIRECTION OF ELT SIGNAL LEFT CENTER RIGHT

  20. Handheld DF Use L-Per on DF mode. Find centre (there should be two ) 180 DEGREES APART. More than two centres? Means getting REFLECTIONS. use REC mode. Or move to another location. Take multiple bearings to the target. Triangulate with bearings. Watch for sources of error.

  21. Resolving DF Ambiguity • Turn left or right to tell. • Rule of thumb; • If needle moves opposite of turn, ELT is in front of you. • If needle moves in direction of turn, ELT is behind you.

  22. Little L-Per How it worksDF Mode CENTER

  23. Little L-Per How it worksDF Mode LEFT

  24. Little L-Per How it worksDF Mode LEFT

  25. Little L-Per How it worksDF Mode LEFT

  26. Little L-Per How it worksDF Mode CENTER

  27. Little L-Per How it worksDF Mode RIGHT

  28. Little L-Per How it worksDF Mode RIGHT

  29. Little L-Per How it worksDF Mode RIGHT

  30. Little L-Per How it worksDF Mode Probable target area CENTER Mark your coordinates Take bearing Adjust for magnetic variation Draw line on map

  31. Little L-Per How it worksDF Mode-Situation CENTER

  32. Little L-Per How it worksDF Mode-Situation 2nd-Centre CENTER

  33. Little L-Per How it worksDF Mode-Reflection CENTER

  34. Little L-Per™Signal Detected • 6 Steps: use the full procedure every time! • Turn the unit to RECeive, check proper frequency and volume. • Turn the Sensitivity knob to HALF SCALE. • This will prevent oversense and is a good starting point.. • Turn the unit to DF. • Turn at least one FULL circle. • Check: Use Turn to Tell: the needle will point toward the target. • Use your compass, to get a bearing to the ELT.

  35. ELT search basics Look for obvious target areas near SARSAT hit airports, heliports, depots. Look for high ground. Be at least 20 ft away from vehicles, wires, or other large, conductive objects. Persons other than the operator should be at least 10 feet from the antenna. Take numerous bearings. Box the target or triangulate.

  36. Radio Direction Finding Two methods of RDF Triangulation (signal strength, bearing) Homing (signal strength and direction)

  37. Triangulation • Best method for ground personnel to get an accurate fix when search aircraft support is unavailable

  38. Triangulation-Taking Bearings • Make sure that nothing magnetic is affecting your compass…like the hood of a car where the chart has been laid out. • You must be able to receive the signal. • Center up DF unit on the signal. • Take the magnetic bearing (shoot an azimuth). • Correct for magnetic variation. • Plot your bearing (draw a line) on map. • Move to another location and repeat the above steps. • The ELT should be where the bearing lines cross.

  39. Triangulation - REC Mode Reference to point of Strongest signal indication

  40. Triangulation - DF Mode Reference To direction of signal Needle centered

  41. Triangulation - DF Mode ELT

  42. Triangulation-DF Mode

  43. Here Are Your Six Steps Again: • REC • HALF • DF • CENTER • TURN • BEARING

  44. Note re choice between LH and LL-16 • When both LH Little Lper ( Blue 1973 analog model ) and LL-16 Little Lper ( Orange 2006  digital model ) are available and serviceable, LL16 should be used during SAR DF tasking.

  45. Are there any questions?

  46. “THAT OTHERS MAY LIVE” CASARA THANK YOU

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