Transcript Module-8-LH-Series-Homer-Blue-operation
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.
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
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.
ELT –Mode Switch
REC MODE
TO DETECT AND MEASURE SIGNAL STRENGTH ONLY
DF MODE
TO FIND DIRECTION OF ELT SIGNAL
Little L-Per How it works
Little L-Per How 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
ELT Homer-Meter-REC Mode METER
REC MODE
MEASURES SIGNAL STRENGTH LEFT-WEAK / RIGHT- STRONG
Little L-Per How it works REC mode WEAK SIGNAL STRONG SIGNAL METER
REC MODE
MEASURES SIGNAL STRENGTH ONLY
Little L-Per How it works REC mode WEAK SIGNAL STRONG SIGNAL METER
REC MODE
MEASURES SIGNAL STRENGTH ONLY
WEAK SIGNAL Little L-Per How it works REC mode STRONG SIGNAL METER
REC MODE
MEASURES SIGNAL STRENGTH ONLY
WEAK SIGNAL Little L-Per How it works REC mode STRONG SIGNAL METER
REC MODE
MEASURES SIGNAL STRENGTH ONLY
WEAK SIGNAL Little L-Per How it works REC mode STRONG SIGNAL METER
REC MODE
MEASURES SIGNAL STRENGTH ONLY
WEAK SIGNAL Little L-Per How it works REC mode STRONG SIGNAL METER
REC MODE
MEASURES SIGNAL STRENGTH ONLY
Little L-Per How it works REC mode WEAK SIGNAL STRONG SIGNAL METER
REC MODE
MEASURES SIGNAL STRENGTH ONLY
WEAK SIGNAL Little L-Per How it works REC mode STRONG SIGNAL METER
REC MODE
MEASURES SIGNAL STRENGTH ONLY
WEAK SIGNAL Little L-Per How it works REC mode STRONG SIGNAL Probable target area Mark your coordinates Take bearing Adjust for magnetic variation Draw line on map
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.
ELT Homer-Meter-DF Mode METER
DF MODE
SHOWS DIRECTION OF ELT SIGNAL
LEFT CENTER RIGHT
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.
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.
Little L-Per How it works DF Mode
CENTER
Little L-Per How it works DF Mode
LEFT
Little L-Per How it works DF Mode
LEFT
Little L-Per How it works DF Mode
LEFT
Little L-Per How it works DF Mode
CENTER
Little L-Per How it works DF Mode
RIGHT
Little L-Per How it works DF Mode
RIGHT
Little L-Per How it works DF Mode
RIGHT
Little L-Per How it works DF Mode Probable target area Mark your coordinates Take bearing
CENTER
Adjust for magnetic variation Draw line on map
Little L-Per How it works DF Mode-Situation
CENTER
Little L-Per How it works DF Mode-Situation 2 nd -Centre
CENTER
Little L-Per How it works DF Mode-Reflection
CENTER
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
T
urn to
T
ell: the needle will point toward the target.
6. Use your compass, to get a bearing to the ELT.
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.
Radio Direction Finding • Two methods of RDF – Triangulation (signal strength, bearing) – Homing (signal strength and direction)
Triangulation • Best method for ground personnel to get an accurate fix when search aircraft support is unavailable
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.
Triangulation - REC Mode Reference to point of Strongest signal indication
Triangulation - DF Mode Reference To direction of signal Needle centered
Triangulation - DF Mode
ELT
Triangulation-DF Mode
Here Are Your Six Steps Again: •
REC
•
HALF
•
DF
•
CENTER
•
TURN
•
BEARING
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.
Are there any questions?
“THAT OTHERS MAY LIVE” THANK YOU