Part #:

Model: C406-NHM




ELT (406 MHz) w/ Nav Interface (Helicopter Model)

Part Number :

  • Model for helicopter installations: equipped with a 6 axis "G" switch  
  • Emergency Locator Transmitter with Integrated Position Encoding - A single output ELT that incorporates latitude/longitude information from the aircraft navigation system
  • Designed for commercial, business and military aviation requirements
  • Integrated ELT to NAV interface (to any GPS, FMC or FMS with ARINC 429 databus)
  • Transmits Latitude & Longitude of aircraft position with 100 meter accuracy
  • 5-Year Lithium Battery
  • Optional programming adapter accommodates 24-bit or tail number programming
  • Rugged MIL-spec connector
  • Operating on 406, 121.5 & 243.0 MHz frequencies
  • All 3 emergency frequencies utilize the same FR output
  • Mounting tray compatible with all Artex 406 MHz ELT's
  • Immediate search & rescue response
  • TSO C91a, TSO C126, ETSO 2C126, COSPASS/SARSAT approved
  • Worldwide coverage
  • Uses a BNC connector output for 121.5 and 243.0 MHz, the 406 MHz frequency is transmitted through a TPS connector
  • Automatically activates during a crash and transmits the standard swept tone on 121.5 and 243.0 MHz
  • Every 50 seconds for 520 milliseconds (long message protocol) the 406.025 MHz transmitter turns on and transmits an encoded digital message to the Compas/Sarsat satellite system
  • Except for the end cap (P/N 452-5066), the mounting hardware for the C406-N series is compatible with all previous models of Artex 406 MHz ELT's
Operating Frequencies: 406.028 MHz ± 1 kHz Biphase L (16K0GID), 121.5 & 243.0 MHz ± 0.005% (A3X) Output Power: 406 MHz: 5W(520ms/50sec) for 24 hours @ -20°C to +55°C 121.5/243.0 MHz: 100mW min for 50 hours @ -20°C to +55°C
Output Connector: BNC Female Activation: Automatic by 4.5ft/sec G-Switch or Manual
Battery: 5 year Lithium Temperature: Operating: -20°C to +55°C Storage: -55°C to +85°C
Self Test: G-Switch enabled 406 MHz Power Antenna/Coax Connection Position Data Present Low Battery Remote Control: ON/ARM/RESET
Antenna: Rod (110-338)( Blade (110-340) Mounting Hardware: Mounting Tray P/N: 452-5050 Protective Top Cover P/N: 452-3052 End Cap P/N: 452-5066
Other Parts:  Coax cable Buzzer (to alert ground crew of accidental activation) C406-N Programming Adapter (P/N 453-5078)- Optional Weight: ELT Transmitter: 3lb 8oz Max Mounting Tray: 7 oz Protective Top Cover: 6.7oz End Cap: 3.8oz Total Weight: 4lb 10oz 
Measurements: ELT Transmitter with Mounting Hardware installed: 11.74"L x 3.9"H x 3.82"W    
Part Number Model: C406-N ELT Description:
453-5060 C406-N ELT Transmitter Only (Main Assembly)
453-5061 C406-NHM Helicopter ELT Transmitter Only (Main Assembly)
455-5060* C406-N ELT Base Pack List - contains transmitter & mounting hardware
455-5061* C406-NHM Helicopter ELT Base Pack List - contains transmitter & mounting hardware
455-5062* C406-N Complete ELT System with Blade Antenna (110-340)
455-5063* C406-N Complete ELT System with Rod Antenna (110-338)
455-5064* C406-NHM Complete Helicopter ELT System with Rod Antenna (110-338)
455-5066* C406-N Complete ELT System with Blade Antenna (110-341 hi-speed), 15' co-ax Cable, Gray Remote Switch
455-5067* C406-N Complete ELT System with Blade Antenna (110-341 hi-speed), 15' co-ax Cable, Black Remote Switch
455-5069* C406-N Complete ELT System with Blade Antenna (110-341 hi-speed)
455-5070* C406-N Complete ELT System with Rod/Whip Antenna Combo (110-343)
455-5071* C406-N Complete ELT System with Rod Antenna (110-338) & NVG Remote Switch
* Please Note that the Attached "Pack Lists" are for REFERENCE ONLY & are subject to change.


- ELT (Base Pack List)

NSN: 6610-01-565-9857

Price Condition Status
- ELT (406 MHz) w/ 110-338 Rod Antenna
Price Condition Status
- ELT w/110-338 Rod Antenna, NVG switch
Price Condition Status
- Emergency Locator Transmitter

NSN: 6610-01-553-8726

Price Condition Status

Click on a question below to see the answer. If you have a question about this model that is not answered below, please contact

An Artex ELT with a part number ending in -999 simply indicates that the unit is not programmed and is intended to be programmed via dongle (DGL-1) or wired into the ELT NAV interface (455-6500). Mostly only fleet operators and airlines request this programming ability to avoid reprogramming an ELT during routine maintenance should the ELT be replaced.

Most Artex ELT systems are received by distributors programmed with the ELT serial number for use in the USA. Thus the P/N ends in -366. If the ELT is programmed for another country, then the appropriate labels are placed on the ELT. However, the original dataplate part number remains the same. Dealer/distributors who are authorized to program Artex ELTs are not permitted to change the part number of the ELT.

Therefore, if someone requires an Artex ELT to actually have the -999 part number then this must be requested before the distributor places the order with the factory. Otherwise, programmed ELTs can be programmed with a default hex address and ID to be equivalent to the -999 status. When this is done by an authorized programming facility, the dataplate remains the same but the separate label with country and three digit code becomes blank and the hex ID label indicates the default hex ID.
It depends on the make and model of the ELT. However, most 406 ELTs have a battery life of either 4 or 5 years. Most batteries can transmit for as long as 24 hours.
Most commonly utilized by fleet operators, the DGL-1 programming dongle allows an ELT to be transferred between aircraft without having to reprogram or re-register. The Artex DGL-1 is mounted on the ELT cover (see picture). The DGL-1 is not a memory device that stores multiple ELT coding formats. Instead, the aircraft 24 bit address is coded into the dongle by setting a series of small dip switches. The switches are accessed by removing 4 screws that attach the dongle to the ELT top cover. Inside the dongle, there are two rows of 12 switches (see picture). These 24 switches are used to set the aircraft's 24 bit address by way of binary 1s and 0s. 1s are electrical ground, 0s are electrically open.

A few other notes regarding the DGL-1:
  • The connector between the DGL-1 and ELT is only compatible with the C406 and G406 series ELTs.
  • The DGL-1 switches do not have to be set by an approved Artex programming facility.
  • The 24 bit address programmed via the DGL-1 switches overwrites any other programming on an ELT once it is powered on.
After February 1st, 2009, Emergency Locator Transmitters (ELTs) operating on the 121.5 and 243 MHz will not be monitored by the COSPAS-SARSAT satellite system. There are many false distress signals and searches initiated each year with ELTs. The newer 406 MHz ELTs transmit unique aircraft information allowing authorities to contact an aircraft owner before a search is initiated. Therefore, 406 MHz significantly decrease the amount of unnecessary searches.

While 121.5 MHz is the international distress signal, it has limitations in relation to the search and rescue efforts that would follow the activation of this frequency by an ELT. Accuracy to a crash site of an aircraft with a 121 MHz ELT can be up to 20 miles. With the enhanced performance of the 406 MHz ELT and programmed aircraft information, accuracy is improved to 2 miles.

After February 2009, the 121/243 distress signals will only be detected by ground based receivers such as air traffic control, local airports, or other aircraft. Therefore, the search and rescue efforts related to an aircraft with an older ELT could be limited and will take longer, especially in a remote location.

Some aircraft owners do not respond positively towards FAA mandates. The February 1st 2009 ELT date is not a deadline to comply with any sort of ELT mandate. As mentioned, this date only applies the discontinuance of 121/243 ELT monitoring by the COSPAS-SARSAT satellite system. Therefore, aircraft owners must decide what value to place on their safety and survival should they be put in an emergency situation where the ELT would be activated.
Programmed aircraft information is essential for search & rescue, should the ELT be activated. When activated, the ELT will transmit your identifier.

An Emergency Locator Transmitter (ELT) should be programmed with either the aircraft tail #, a serial #, or the aircraft operator designator. The aircraft information programmed is determined by your country's requirements. The information is sent to the government agency responsible for keeping the database of the country in which your aircraft is registered.

The ID is linked to your SAR database, containing valuable aircraft information: Type of Aircraft, Address of Owner, Telephone # of Owner, Aircraft Registration #, and Alternate Emergency Contact, etc.

Keeping this information up to date & accurate is a major concern of the Search & Rescue Centers. Without accurate information, valuable time may be lost in attempting to locate the owner of the aircraft.

Your ELT can easily be programmed by a certified repair station, such as Southeast Aerospace.

Contact Southeast Aerospace today for more information on ELT programming.
The 366 at the end of any Artex 406MHz ELT simply indicates that the unit is programmed for the USA serialized long message format. All Artex 406 ELTs (C406 and G406 series) except for the ME406 are shipped from Artex with the 366 programming unless you specify otherwise. For international applications, once the ELT is reprogrammed, the unit dataplate and box label is updated with the new programming information. An updated FAA Form 8130 is issued at this time as well.

Therefore, if you are searching for an Artex 406 ELT ending in the -366 such as 455-5015-[366], then you can use the base number (ex. 455-5015) in most cases.
COSPAS is an acronym for the Russian words "Cosmicheskaya Sistema Poiska Avariynyh Sudov" . These Russian words translate to "Space System for the Search of Vessels in Distress".
SARSAT is an acronym for "Search And Rescue Satellite-Aided Tracking". The SARSAT system was developed as a joint effort by the USA, Canada, and France.
Click here to view the ELT reference guide.
Click here to view the guidelines.

If a problem is detected in the ELT, the LED will produce a coded signal. The LED will flash in order of importance with approximately .5 to 1 second pulse between each coded signal if multiple errors are present. The coded signal and related problems are as follows:

  • 1 flash indicates a G-switch loop open failure
  • 3 flashes indicate a 406 MHz transmitter problem such as defective or unconnected coax, low power output or programming error
  • 5 flashes indicate no navigation data present for ELTs interfaced to a GPS nav interface unit. This error is most likely due to faulty interface wiring, improper programming, invalid navigation data caused by nav system not powered up or GPS nav interface unit (P/N 453-6500) not being present
  • 7 flashes indicate a battery problem. Usually this occurs when the battery usage time is over an hour. A bench test by an approved Artex service center can indicate how many times the ELT has been activated and for how long

Southeast Aerospace has full bench test and programming capabilities for all Artex (Cobham) ELTs. Please contact the SEA Service Dept for any ELT service questions.

Even though the battery pack expires 5 years from the date the ELT is shipped from Artex, there are other factors that take priority. The Artex manual states that the battery pack must be replaced with a new battery pack in the following situations:
  • After use in an emergency
  • After an inadvertent activation of unknown duration
  • When the total of all known transmission exceed 1 hour
  • On or before the battery replacement data as indicated on the battery label

If any of these conditions are met, the battery must be replaced.

Artex batteries contain a microchip that records total activation time and number of activation times. The ELT tester will show this information when the unit is tested.

The only indication that new ACR/Artex ELTs have the upgraded G-switch as detailed in SB1000 is the "UPGRADED G-SWITCH" box on the identification plate.  Please see image for reference.


In relation to NE (New) parts, many OEMs change their prices and availability without any notice to dealers or the industry. Therefore, through the REQUEST or RFQ indication, we ask that customers contact us for the most accurate price and availability.

In relation to SV & OH parts, the used parts aftermarket in the aviation industry is not an infinite supply. It is a dynamic, constantly changing market that is significantly affected by and susceptible to highs and lows in supply and demand. Therefore, although we attempt to, at times, we are unable to predict the exact moment when an item may be available. Once again, through the REQUEST or RFQ indication on our website, we ask that customers contact us for the most current and accurate price and availability.

PLEASE NOTE - Publications are for Reference Only