ELTA ADT406S User Manual
Title Page
USER’S HANDBOOK
USER’S HANDBOOK
INCLUDING INSTALLATION MANUAL
AND LOG BOOK
SERIAL NUMBER LABEL
EMERGENCY LOCATOR TRANSMITTER
MODEL
IN THE COSPAS / SARSAT SYSTEM
ADT 406 S
Issued by
ELTA
F6614
14 Place Marcel Dassault
31702 BLAGNAC
France
www.elta.fr
Documentation P/N: 04E66260 Rev A
Initial issue: June 6/05
June 6/05
USER’S HANDBOOK
LIST OF UPDATES
UPDATE
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INSERTION INSERTION
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TABLE OF ILLUSTRATIONS
LEADING PARTICULARS
TABLE OF CONTENTS
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Appendix B
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TABLE OF ILLUSTRATIONS
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Figure 1 : COSPAS/SARSAT - System Principle 12
Figure 2 : ELT ADT 406 S Presentation 14
Figure 3 : ELT ADT 406 S – Dimensions (Basic Configuration) 15
Figure 4 : Installation of the ELT ADT 406 S - Drilling Pattern Dimensions 22
Figure 5 : ELT ADT 406 S - Detailed Description 29
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LEADING PARTICULARS
CAUTION 1 : THIS TRANSMITTER IS AUTHORIZED FOR USE ONLY DURING SITUATIONS OF GRAVE
AND IMMINENT DANGER.
CAUTION 2 : IT IS IMPERATIVE THAT EACH BEACON OWNER REGISTERS THEIR BEACON. CONTACT
ELTA OR APPROVED AGENT TO OBTAIN THE INFORMATION RELATIVE TO THIS
REGISTRATION.
CAUTION 3 : THE BEACON MUST IMPERATIVELY BE PROGRAMMED WITH THE RELEVANT
IDENTIFICATION AUTHORIZED BY THE LOCAL AIRWORTHINESS.
CAUTION 4 : ONCE THE BEACON HAS BEEN PROGRAMMED, IT IS GENERALY ASSIGNED TO AN
AIRCRAFT (NAME AND IDENTIFICATION). IF THIS BEACON IS USED ON ANOTHER
AIRCRAFT IT WOULD HAVE TO BE REPROGRAMMED (NEW NAME AND IDENTIFICATION).
CAUTION 5 : BEFORE INSTALLING OR USING THIS EQUIPMENT, THE VALIDITY OF THE INFORMATION
ON THE BEACON LABEL MUST IMPERATIVELY BE CHECKED.
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TABLE OF CONTENTS
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1. INTRODUCTION TO THE COSPAS-SARSAT SYSTEM 11
A. The COSPAS-SARSAT system 11
B. System organization 11
C. The distress frequencies 13
D. ELTA and the COSPAS-SARSAT system 13
2. GENERAL DETAILS OF THE ELT ADT 406 S 14
A. Purpose of the ELT ADT 406 S 14
B. Characteristics 16
3. DESCRIPTION OF THE ELT ADT 406 S 18
A. General description 18
B. Detailed description 18
4. INSTALLATION OF THE ELT ADT 406 S 21
A. General 21
B. Installation of the beacon on the aircraft 21
C. Installation and configuration of the beacon 23
5. UTILIZATION OF THE ELT ADT 406 S 24
A. Automatic activation 24
B. Manual activation 24
C. Remove beacon from the support 25
C. Beacon shutdown 26
D. Beacon self-test 26
6. MAINTENANCE OF THE ELT ADT 406 S 27
A. Beacon self-test 27
B. Water Sensor test 27
C. Maintenance periodicity table 27
D. Battery replacement 27
E. Battery discarding 28
F. Test to do at the time of a beacon return in workshop 28
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1. INTRODUCTION TO THE COSPAS-SARSAT SYSTEM
A. The COSPAS-SARSAT* system
The purpose of the COSPAS-SARSAT satellite system is to detect and locate all distress signals
transmitted by aeronautical, maritime or land-based beacons, for the search and rescue organizations.
This program is the result of an international collaboration between the United States, Canada and France
on the one hand (SARSAT project), and Russia on the other hand (COSPAS project). These two projects
are fully compatible.
Since the first results were obtained several countries have joined the program. Several other countries
have shown an interest and will soon be joining the COSPAS-SARSAT system partners.
ELTA in relation with CNES (French National Space Agency) has developed the complete range of products
required for COSPAS-SARSAT system operation.
Following an in-depth study phase, ELTA has arrived at highly conclusive technical results, and
experimental and operational use of the "ground" equipment have proven this equipment's reliability and
ease-of-use.
B. System organization (Ref. Fig. 1)
In the COSPAS-SARSAT system, space equipment is placed on board several satellites in low near-polar
orbit to capture transmissions from emergency transmitters and to retransmit these signals to specialized
ground stations called Local User Terminals (LUT). These ground stations determine the position of the
emergency transmitters and then retransmit the position data to the designated Mission Control Centers
(MCC). The MCCs in turn retransmit these data to the appropriate Rescue Coordination Centers (RCC) so
that they can start the search and rescue operations.
* COSPAS-SARSAT :
COSPAS = Kosmicheskaya Sistyema Poiska Avariynych Sudov
SARSAT = Search and Rescue Satellite-Aided Tracking
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Legend :
ELT : Emergency Locator Transmitter
EPIRB : Emergency Position Indicating Radio Beacon
PLB : Personal Locator Beacon
RCC : Rescue Coordination Centers
MCC : Mission Control Centers
LUT : Local User Terminals
COSPAS/SARSAT – System Principle
Figure 1
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C. The distress frequencies
There are several advantages to using the 406 MHz frequency :
– Worldwide coverage: locating is not only possible in real-time within a radius of 2,500 km around the
station, but also in global mode outside this zone since the satellites memorize the messages on the 406
MHz frequency. Location process uses Doppler effect.
– Locating accuracy: 2 km as opposed to 10 to 15 km in the 121.5 MHz or 243 MHz frequencies. It should
be noted however that the 406 MHz beacons also transmit 121.5 MHz and 243 MHz signals which
enable the final approach of the rescue teams in homing mode.
– Information reliability: the structure of the digital signal transmitted by these beacons makes it possible to
be sure that there is actually a distress situation, as well as to identify automatically the mobile in distress
which is vital for rescue operations.
– Unique identification: each beacon has it’s own identification information.
D. ELTA and the COSPAS-SARSAT system
(1)406 MHz distress beacons:
These beacons transmit to the satellites a digital message which identifies them and gives their position,
as well as a signal that facilitates the final approach of the rescue teams.
They are suitable for all types of use (maritime, aeronautical and land) and can, depending on the model,
be activated manually or automatically. They are designed to function in the most extreme conditions with
a high degree of reliability.
(2)Satellites low earth orbiting:
At least four satellites are permanently operational. Since their orbit is near-polar, in the worst case every
point on Earth is overflown every two hours.
In a ground station's visibility zone, the satellites directly transmit the messages captured in that zone, and
also any messages from the zones not covered that they have stored in memory.
(3)Geo-stationary satellites are now available in the system and offer faster detection capability (close to 5
minutes) but require a GPS receiver to supply location that is sent via C/S message.
(4)Ground reception stations:
The zone effectively covered (or visibility zone) is a circle with a radius of 2,500 km around the station.
These stations receive (via the satellites) and process, in real time, the messages from the beacons
activated in their visibility zone and, in batch mode, the messages from the 406 MHz beacons activated
outside that zone and memorized by the satellites.
Automatic processing of the 406 MHz digital messages allows the beacons to be located and the carrier
mobile to be identified.
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2. GENERAL DETAILS OF THE ELT ADT 406 S
A. Purpose of the ELT ADT 406 S (Ref. Fig. 2)
The ELT ADT 406 S consists of a beacon that incorporates means of attachment.
The ELT ADT 406 S is designed to transmit a digital distress signal to satellites that are part of the
COSPAS/SARSAT SYSTEM.
These satellites transmit the captured signal to the reception stations on the ground.
This signal is transmitted on the 406.028 MHz frequency and is used to precisely locate and identify the
ELT ADT 406 S.
It also transmits a 121.5 MHz and 243 MHz signal to facilitate the final approach of the distress scene
(homing).
It can be triggered manually or automatically by means of a water sensor.
This ELT meets the latest JAR OPS and ICAO recommendations.
Any encoding protocol defined by COSPAS/SARSAT can be used with ELT ADT 406 S including country
code assignation.
Metalic strap
Support
Velcro strap
Float
Whip antenna
Identification and
water sensor module
Self test
push button
ON/OFF/ARMED switch
ELT ADT 406 S- Presentation
Figure 2
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