ELTs - General Aviation
An Emergency Locator Transmitter (ELT) is a device that can be
manually or automatically activated to transmit a distress signal
to a satellite. ELTs that activate automatically use a "G-Switch"
(gravity switch) that triggers the ELT when it senses that a crash
has occurred. With ELTs, Search and Rescue teams may more easily
pin-point the exact location of a downed aircraft. Section 91.207
of the Federal Aviation Regulations states that no person, as well
as Part 121 operators and operations governed by Part 135, may
operate a U.S. registered civil aircraft unless an approved
automatic type emergency locator transmitter is attached to the
aircraft. Similar regulations are established by aviation
authorities throughout the world.
A Rescue Works
As of 2009, traditional 121.5 MHz ELTs are no longer monitored
by satellite. The system has been replaced by a far more powerful
and robust system operating on 406 MHz. When you upgrade your
ELT to 406 MHz, you will have peace of mind knowing you can be
found quickly in the event of an emergency or unplanned landing.
Even if you have an ACR Personal Locator Beacon (PLB) or satellite
phone, it's still important to have an upgraded ELT that can
automatically transmit a distress signal with your location.
Without upgrading your ELT, it can take days or sometimes
weeks to locate a crash scene. Rescuers must first know you are
missing and they must also know your intended route and
destination. If the stars are aligned properly, a plane passing
overhead might be monitoring the 121.5 MHz frequency and hear your
distress signal. Don't depend on luck! Upgrading your ELT means
rescuers will know within minutes that you're in distress, who you
are, and exactly where you're located. This will drastically
increase your chances of survival.
TSO C-126 prescribes the minimum performance standard that an
ELT operating on 406 Megahertz (MHz) must meet as well as
determines the requirement for the aircraft owner to register the
digital message programmed into the ELT with Cospas/Sarsat.
TSO C-126-approved ELTs will also transmit on 121.5 MHz frequency
for homing purposes only as the satellites alerting of the
121.5 MHz distress signal have been discontinued and replaced by
the 406 MHz-detectable satellites.
ARTEX ELTs are the choice of general aviation aircraft including
Cessna, Piper, Cirrus, Beechcraft, Diamond, and Quest.
The ARTEX ELT 1000 is a value-priced upgrade to standard 121.5
MHz transmitters, which are no longer monitored by the
Cospas-Sarsat system. The 406 MHz transmitter produces a much more
accurate position, typically 3 kilometers as compared with 15 to 20
kilometers for 121.5 MHz transmitters. When coupled to the aircraft
navigation system via a navigation interface, the ELT 1000's
accuracy improves to approximately 100 meters.
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The Artex ME406, a single output ELT, utilizes the same RF
output and only one coax cable to transmit a 406 MHz emergency
signal to the Cospas/Sarsat satellites and a local 121.5 Homing
signal. The ELT automatically activates during a crash and
transmits a continuous swept tone of 121.5 MHz. During activation,
the 406 MHz transmitter sends an encoded 5-watt signal to the
Cospas-Sarsat Satellites every 50 seconds for 440 milliseconds to
alert Search and Rescue.
The Artex ME406 ACE (Absolute Cost Efficiency), a single output
ELT, utilizes the same RF output and only one coax cable,
connecting to the new series of Artex single input antennas to
transmit 121.5 and 406 MHz emergency signals to the Cospas/Sarsat
satellites. The ELT automatically activates during a crash and
transmits the standard swept tone on 121.5 MHz. Every 50 seconds,
for 440 milliseconds, the 406 MHz transmitter turns on and sends an
encoded 5-watt signal to alert Search and Rescue.
As a single-output Emergency Locator Transmitter, the Artex
ME406P utilizes the same RF output to transmit 121.5 and 406 MHz
emergency signals to the Cospas/Sarsat satellites. The ELT
automatically activates during a crash and transmits a
continuous swept tone of 121.5 MHz. During activation, the
406 MHz transmitter sends an encoded 5-watt signal every 50 seconds
for 440 milliseconds to alert Search and Rescue.
The Artex G406-4 transmits on all 3 emergency frequencies
(121.5/243.0 and 406 MHz). The system was designed for use with the
general aviation market in mind. The ELT automatically activates
during a crash and transmits the standard swept tone on 121.5 and
243.0 MHz. The G406-4 also transmits a 406 MHz encoded digital
message to the Cospas/Sarsat satellite system, which allows for
rapid identification and reduces Search and Rescue response
Test your 406 MHz Emergency Locator Transmitter through the
Cospas-Sarsat satellite system to ensure the ELT is working
properly and the installation has been completed correctly.
The SLB406 was developed for use by crew members in the cabin or
upon inflation of a life-raft. Engineered for ease of operation,
the SLB406 is activated by pushing a large "Activate" button when
requested by the aircraft's pilot in addition to the automatic
fixed ELT on board. Optional flotation collar P/N: 452-0036
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