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

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Presentation on theme: "LH Series L-PER (The older blue homer and the larger H-Antenna) Module 8 of CASARA ELT Training Plan."— Presentation transcript:

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. 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 PARK AIRCRAFT, VEHICLE IN THE OPEN, AWAY FROM METAL BUILDINGS

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-Per How it works

7 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 works REC mode WEAK SIGNAL STRONG SIGNAL METER REC MODE MEASURES SIGNAL STRENGTH ONLY

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

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

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

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

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

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

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

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

18 Little L-Per How 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 works DF Mode CENTER

23 Little L-Per How it works DF Mode LEFT

24 Little L-Per How it works DF Mode LEFT

25 Little L-Per How it works DF Mode LEFT

26 Little L-Per How it works DF Mode CENTER

27 Little L-Per How it works DF Mode RIGHT

28 Little L-Per How it works DF Mode RIGHT

29 Little L-Per How it works DF Mode RIGHT

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

31 Little L-Per How it works DF Mode-Situation CENTER

32 Little L-Per How it works DF Mode-Situation 2 nd -Centre

33 Little L-Per How it works DF Mode-Reflection CENTER

34 Little L-Per™ Signal Detected 6 Steps: use the full procedure every time! 1.Turn the unit to RECeive, check proper frequency and volume. 2.Turn the Sensitivity knob to HALF SCALE. This will prevent oversense and is a good starting point.. 3.Turn the unit to DF. 4.Turn at least one FULL circle. 5.Check: Use Turn to Tell: the needle will point toward the target. 6.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 REC HALF DF CENTER TURN BEARING Here Are Your Six Steps Again:

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” THANK YOU CASARA


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