|
|
|
Frequently
Asked Questions about SARSAT
Frequently Asked Questions
about…
(Click on a category below to find FAQ on that topic)
… about the Phase-out of 121.5 MHz Satellite
Alerting
-121.5 MHz vs. 406 MHz Comparison Chart
Appendix A - Advantages of 406 MHz Beacon (especially
ELTs)
Appendix B - History of 121.5 MHz Emergency Beacon Actions
What is the Cospas-Sarsat Program?
The Cospas-Sarsat Program is
an international organization that provides space-based relay of distress
signals, or alerts, from 121.5 MHz and 406 MHz emergency beacons. Cospas-Sarsat provides the emergency
alerts to search and rescue (SAR) authorities internationally.
The governments
of
Cospas is a
Russian acronym for “Space System for Search of Vessels in
Distress”
The web site www.cospas-sarsat.org contains more
information on the program.
What is the Cospas-Sarsat Secretariat?
The Cospas-Sarsat
Secretariat is the permanent administrative organ of the international program
responsible for assisting the Cospas-Sarsat Council in implementing the
Program. The Secretariat contains a
small, specialized and dedicated staff that assists in organizing meetings,
administering the international budget, and providing technical and operational
assistance.
When was the Cospas-Sarsat formed?
The first Cospas satellite
launch was in 1982, during the same year the first rescue using the system was
recorded. The system was declared
operational in 1985. At this time
the four member agencies of Cospas-Sarsat were working under a Memorandum of
Agreement. As the program matured,
it was decided to have an intergovernmental agreement between the Governments
of Canada,
Why is the National Oceanic and Atmospheric Administration (NOAA)
involved in Search and Rescue?

NOAA operates the
nation’s civil environmental satellites. These satellites are used to monitor the
weather. These satellites also carry instruments that detect emergency
beacons. As NOAA operates the
satellites that carry search and rescue instruments and operates the equipment
to receive and process distress signals, it is the lead agency in the
Who are the other agencies involved with Cospas-Sarsat in the
Besides NOAA, the U.S. Air
Force Rescue Coordination Center (AFRCC) at Langley Air Force Base (http://www2.acc.af.mil/afrcc/) is
responsible for inland search and rescue coordination, the U.S. Coast Guard
responsible for maritime search and rescue (http://www.uscg.mil/hq/g-o/g-opr/sar.htm),
and the National Aeronautics and Space Administration (http://searchandrescue.gsfc.nasa.gov)
responsible for research and development are partners in the national
Cospas-Sarsat program.

What is an EPIRB?
An EPIRB is an emergency
position-indicating radio beacon.
It is a device that can be automatically or manually activated to transmit
a distress signal to a satellite.
EPIRBs that activate automatically typically have a hydro-static release
mechanism that allows the beacon to release from its bracket, float to the
surface and start transmitting. The
beacon, along with the bracket, has to sink to approximately 3 meters before it
can activate. This should be taken
into account when mounting an automatic type EPIRB.
EPIRBs transmit at either
121.5 MHz or 406 MHz. More
information on both frequencies is available under the “Phase Out of 121.5 MHz Satellite Alerting” section
below. 121.5 MHz EPIRBs can either
be Class A or Class B. Class A
EPIRBs can be activated either manually or automatically, Class B EPIRBs can
only be activated manually. 406 MHz
EPIRBs can either be Category I or Category II EPIRBs. Category I EPIRBs can be activated
either manually or automatically, Category II EPIRBs can only be activated
manually.
Use of Class A and B EPIRBs
will be discontinued in the near future.
Please refer to the U.S. Coast Guard’s Office of Search and Rescue
homepage (http://www.uscg.mil/hq/g-o/g-opr/sar.htm)
for more information.
What are the differences in EPIRB Categories?
A Category I EPIRB
is one that is designed to be automatically activated when the beacon sinks to
a certain depth (anywhere from 12 – 15 feet below the surface) or it can
be manually activated. A Category
II EPIRB is one that can only be activated manually.
What is an ELT?
An ELT is an emergency
locator transmitter. It is a device
that can be automatically or manually activated to transmit a distress signal
to a satellite. ELTs that activate
automatically typically have a “G” or gravity switch that triggers
the ELT when it senses that a crash has occurred. There are several types of ELTs:
$ Automatic
Fixed ELTs are intended to be permanently attached to the aircraft before and
after a crash and are designed to aid search and rescue teams in locating a
crash site.
$ Automatic
Portable ELTs are intended to be rigidly attached to the aircraft before the
crash but readily removable from the aircraft after a crash
$ Survival
ELTs do not activate automatically and are intended to be removed from the
aircraft
$ Automatic
Deployable ELTs are intended to be rigidly attached to the aircraft before the
crash and automatically deployed after crash force sensor has determined that a
crash has occurred.
ELTs can transmit at either
121.5 MHz or 406 MHz, however satellite alerting of 121.5 MHz distress signals
will be discontinued starting in February, 2009. More information on both frequencies,
and on the phase-out of satellite alerting for 121.5 MHz ELTs is available
under the “Phase-Out of 121.5 MHz Satellite Alerting”
section below.
What is a PLB?
A PLB is a personal locator
beacon designed to be carried by an individual. They can only be activated
manually. PLBs can be used by hikers,
canoers, and other people operating in remote areas.
What are the differences in beacon classes?
The only difference is the
operating temperatures. A Class 1
406 MHz emergency beacon is designed to operate between -40°C to
+55°C and a Class 2 406 MHz emergency beacon is designed to operate between
-20°C to +55°C.
How can I get in touch with my 406 MHz beacon
manufacturer?
A complete list of
Cospas-Sarsat approved manufacturers is provided at
http://www.cospas-sarsat.org/Beacons/beaconManufactureList.htm
Are 406 MHz PLBs legal for use in the
406 MHz PLBs have been
authorized for use by the Federal Communications Commission (FCC) starting
What is the difference between emergency beacons that operate at 121.5
MHz and those that operate at 406 MHz?
121.5 MHz beacons transmit
an analog signal that can only be detected by low-earth, or polar orbiting
satellites. The analog signal does
not contain any information about the beacon or its user. Alternatively, 406 MHz beacons transmit
a digital signal that contains information on the type of beacon and owner. Additionally, 406 MHz beacons can be
linked to registration information that can provide search and rescue forces
valuable information when responding to a distress signal. More information on the difference
between 121.5 and 406 MHz beacons is available under the “Phase-Out of 121.5 MHz Satellite
Alerting” section below.
Click here to see a 121.5 MHz vs. 406 MHz Comparison Chart
What is the beacon identification code and where can I find it on the
beacon?
The beacon ID,
also referred to as the Unique Identification Number (UIN) is comprised of 15
hexadecimal characters. Hexadecimal
characters are made of numbers (0 through 9) and the letters A, B, C, D, E and
F. Please note that the letter
“O” as in “Oscar” and the letter “I” as in
“
What is the Unique Identifier Number (UIN)?
The UIN is the same
as the beacon ID, see above.
How do I test my emergency beacon?
That depends on the type of
beacon you own. You can test your
121.5 MHz ELTs only during the first five (5) minutes after any hour and you
may only activate the ELT for three audible sweeps. If operational tests must be made
outside of this period, they should be coordinated with the nearest FAA Control
Tower or FSS. If the antenna is
removable, a dummy load should be substituted during test procedures. In any case airborne tests are not
allowed.
406 MHz emergency beacons should
never be activated unless you are in grave and eminent danger. 406 MHz emergency beacons should only be
tested using the “self-test” feature of the beacon or the beacon
should be taken to an authorized dealer or test facility. A list of U.S. Coast Guard units that
can test your 406 MHz beacon can be found at www.uscg.mil/hq/g-m/cfvs. Look under EPIRB information.
The International Maritime
Organization has published guidelines for annual testing of 406 MHz EPIRBs that
might be of use of beacon owners in general. Some of the relevant guidelines state
that an examination of an installed 406 MHz beacon should include:
$ checking
the position and mounting of automatically activated EPIRBs and ELTs;
$ carrying
out a visual inspection for defects;
$ carrying
out the self-test routine;
$ ensuring
that the beacon ID is clearly marked on the outside of the beacon;
$ checking
the battery expiry date; and
$ checking
the hydrostatic release and its expiry date for automatically activated EPIRBs.
Do I need to inspect my ELTs, and how often?
Yes, you must inspect your
ELT once a year. Each ELT must be
inspected for proper installation, battery corrosion, operation of the controls
and crash sensor, and the presence of a sufficient signal radiated from its
antenna.
Why can’t I register a 121.5 MHz emergency
beacon?
406 MHz emergency beacons
have a unique identifier that allows us to link the emergency beacon to
registration information. A 121.5
MHz emergency beacon transmits an analog signal that does not contain any information. Therefore, there is no way to register
the beacon.
Who is required to carry an ELT?
In general, all
Who is required to carry a 406 MHz EPIRB?
In general,
Is there any guidance on how to use 406 MHz EPIRBs?
You should always follow the
manufacturer’s instructions when using or testing your EPIRB. In general an EPIRB should be placed in
the water and tethered to the survival craft. EPIRBs which are not meant to float in
water should be placed in the survival craft in a vertical position with the
antenna clear of all obstacles, including your self and others in the survival
craft. If your EPIRB has a GPS
interface you should ensure that the EPIRB is outside enclosures, such as a
carbon-fiber vessel hull, which could prevent acquisition of navigational
satellite signals by the GPS.
What is a false alert?
A false alert is an
activation of an emergency beacon in a non-distress situation. Examples of false alerts include
accidentally turning on an emergency beacon, improperly testing a beacon or
incorrectly mounting an emergency beacon so that it falls out of its bracket
and activates.
What can I do to reduce false alerts?
You have the primary
responsibility to prevent false alerts.
You should ensure that you only activate an emergency beacon in
situations of grave and imminent danger.
You should also follow the manufacturer’s instructions for testing
your beacon. Lastly you should
ensure that automatically activated beacons are properly mounted so that a
simple “bump” will not cause them to fall out of their bracket and
activate.
ELTs
Caution should be exercised
to prevent the inadvertent activation of ELT's in the air or while they are being
handled on the ground. Accidental
or unauthorized activation will generate an emergency signal that cannot be
distinguished from the real thing, leading to expensive and frustrating
searches. A false ELT signal could also interfere with genuine emergency
transmissions and hinder or prevent the timely location of crash sites. Frequent false alarms could also result
in complacency and decrease the vigorous reaction that must be attached to all
ELT signals.
Numerous cases of
inadvertent activation have occurred as a result of aerobatics, hard landings,
movement by ground crews and aircraft maintenance. These false alarms can be
minimized by monitoring 121.5 MHz and/or 243.0 MHz as follows:
(a) In flight
when a receiver is available.
(b) Before
engine shut down at the end of each flight.
(c) When the
ELT is handled during installation or maintenance.
(d) When
maintenance is being performed near the ELT.
(e) When a
ground crew moves the aircraft.
(f) If an ELT signal
is heard (sounds like a siren), turn off the aircraft's ELT to determine if it
is transmitting. Newer ELTs have a
cockpit mounted switch; however you will need access to the unit itself if
it’s an older model. If it
has been activated, maintenance might be required before the unit is returned
to the "ARMED" position. You should contact the nearest Air Traffic
facility or Flight Service Station (FSS) 1-800-WXBRIEF and notify them of the
inadvertent activation.
Maintain your ELT
regularly. Low batteries can cause
erroneous signals and generate false alarms. Conversely, false alarms can cause low
batteries. So, make sure you've got strong batteries in your ELT.
EPIRBs
Always test your EPIRB in
strict accordance with the manufacturer’s recommendations. Most EPIRB
activation switches have a test position.
This test position allows the entire unit (electronics, battery, and
antenna) to be tested without generating a false alarm. Ensure that your beacon is registered
with NOAA. This does nothing to reduce false alarm rates, but does have a
dramatic effect on the impact of a false alarm. If the EPIRB is properly
registered, the situation will be resolved with a phone call. It will also help
speed rescue in an actual distress.
Affix your proof-of-registration
decal on the EPIRB so it can be easily read without taking the EPIRB out of its
bracket. A surprising amount of false alarms are generated by people (sometimes
Coast Guard safety inspectors) doing so to check the decal. Never remove the EPIRB from its bracket
without first switching it to the "OFF" position (unless of course,
you're actually in distress). Also, never allow it to be removed by others. A
lot of false alarms are generated by curious passengers. Another common source
of false alarms is from crew members removing the EPIRB to paint behind
it.
Maintain your EPIRB. Ensure
that the batteries are within their expiration date and that all manufacturer
recommendations are followed. Any
time that the EPIRB is not on the vessel, it should be switched
“OFF.”
Finally, realize that the
Cospas-Sarsat satellites are very good at what they do...detecting emergency
beacons. Activation of any 406 MHz
beacon, even for just a few seconds, will usually be detected.
What should I do if I have accidentally activated my emergency beacon?
If for any reason your
beacon is activated accidentally you should contact the appropriate rescue
coordination center, Air Traffic facility or Flight Service Station (FSS)
1-800-WXBRIEF . In the
How can I dispose of my emergency beacon?
You should ensure that when
your beacon needs to be disposed of (for example when its damaged or when a
ship is sold for scrap) it should be made inoperable, either by removing its battery
and, if possible, returning it to the manufacturer, or by demolishing it. If a beacon is to be returned to the
manufacturer with the battery still installed, it should be wrapped in tin foil
to prevent transmission of signals during shipment. Please inform the NOAA/USMCC if you sell
or dispose of a registered 406 MHz beacon.
If I’m a pilot should I monitor for 121.5 MHz
signals?
Yes. Pilots are encouraged to monitor 121.5
MHz and/or 243.0 MHz while in flight to assist in identifying possible emergency
ELT transmissions. On receiving a signal, report the following information to
the nearest air traffic facility:
(a) Your
position at the time the signal was first heard.
(b) Your
position at the time the signal was last heard.
(c) Your
position at maximum signal strength.
(d) Your flight
altitudes and frequency on which the emergency signal was heard: 121.5 MHz or
243.0 MHz. If possible, positions
should be given relative to a navigation aid. If the aircraft has homing
equipment, provide the bearing to the emergency signal with each reported
position.
How do I maintain my beacon?
All beacons need to be
tested and serviced for water tightness, the battery, external damage and
signal strength. Beacons should be
serviced whenever the battery needs replacing. Usually the manufacturer or distributor
services the beacon.
Who has to register a 406 MHz emergency beacon?
All 406 MHz emergency beacon
owners/operators are required to register their 406 MHz emergency beacon (ELTs
and EPIRBs) with NOAA’s SARSAT program. This is a requirement from the Federal
Communications Commission (FCC).
The following web site contains more information on the regulation www.access.gpo.gov., look under Title 47 -
Telecommunication.
How can I register my 406 MHz EPIRB, ELT or PLB or update my
information?
There are several ways to
register you 406 MHz beacon with NOAA.
You may send the registration card or information to the address below
or fax it to (301) 568-8649:
Beacon Registration
NOA/NESDIS, E/SP3, Rm 3320,
FB4
Alternatively, you can save
time and money, and improve the accuracy of the information you provide by
registering your beacon via the Internet at www.beaconregistration.noaa.gov
How do I update my beacon registration information?
You
can now go to www.beaconregistration.noaa.gov
and make the update. If you have
not previously accessed your beacon registration using the internet, you need
to choose the 2nd option (Access Beacon Previously Registered By
Mail).
Does NOAA automatically send of Proof-of-Registration decals and
confirmation reports?
Yes. You should receive a
Proof-of-Registration decal when you initially register your beacon and when
you confirm your registration information every two years. In either case, the decal is sent to the
postal address listed on the registration.
Are there times when I will receive a Proof-of-Registration decal even
though it hasn’t been two years since I registered, or last updated my
information?
Yes, this can happen when
you change or update your information.
Depending on the type of beacon you have, a new proof-of-registration
decal will be sent in the following cases:
EPIRB: When
you update the vessel name
When
you select the renew registration option
ELT: When
the tail number on the aircraft has changed
When
you select the renew registration option
PLB: When
the owner name changes
When
you select the renew registration option
Or, you’ll receive a
new decal when you select the “Replace Decal” option on the
web-based registration system.
How long is my registration information valid in the NOAA registry?
The registration
information, and the corresponding proof-of-registration decal, is valid for
two years. The FCC requires that
you renew your registration every two years. However, you are encouraged to provide
updates to your registration anytime it’s required.
Do I need a ship station license or a documentation number to register
an EPIRB?
You do not need a ship station
license or a documentation number to register an EPIRB.
How can I contact the Federal Communications Commission (FCC)?
They can be reached
at (888) 225-5322 or at www.fcc.gov.
To whom is my 406 MHz emergency beacon registration information
released?
The registration information
is only released to search and rescue authorities such as the U.S. Coast Guard
and the U.S. Air Force. In certain
cases NOAA may release your registration information to beacon manufacturers or
service agents so that they may send you urgent service announcements.
NOAA, under the Privacy Act
of 1974 (as amended), is required to adopt minimum standards for the collection
and processing of personal information and to publish detailed descriptions of
these procedures. The Privacy Act
also limits the making of such records available to other public and private agencies
or parties. Lastly, it requires
agencies to make records on individuals available to them upon request, subject
to certain conditions and exclusions.
The Privacy Act has four
basic policy objectives:
$ to
restrict disclosures of personally identifiable records;
$ to
grant individuals more rights to access records agencies maintain on them;
$ to
grant individuals the right to seek amendments to agency records maintained on
themselves; and
$ to
establish a code of "fair information practices" which requires agencies
to comply with statutory norms for collection, maintenance, and dissemination
of records.
What happens if I do not register my 406 MHz emergency beacon?
The System will still work
but rescue could be delayed. The
Cospas-Sarsat System is designed to provide both identification and location
information. Identification
information can be provided two ways: (1) information such as the radio call
sign or aircraft tail number can be encoded into the 406 MHz emergency beacon
and/or (2) the 406 MHz emergency beacon can be registered in a national
registration database such as the one NOAA maintains.
As long as the System is
able to obtain a position (either using Doppler processing or through the use
of new beacons that can transmit their position as part of the 406 MHz message)
search and rescue personnel can respond to a distress signal. However, when a position is not
available the search and rescue personnel have to rely on registration
information. It’s in these
cases that rescue could be delayed until the System can obtain a position. Even with a position, the response may
be delayed until the search and rescue personnel try to determine the nature of
the distress, and their capability to respond to the location of the
distress. The response would also
vary country by country. NOAA
recommends that you try to list two contacts, one of which, the search and
rescue personnel would be able to reach at any time of the day.
What can I do if I have a 406 MHz emergency beacon coded for a country
that does not maintain a 406 MHz emergency beacon registration database?
You will have to register
your beacon in the International Beacon Registration Database which will be
maintained by Cospas-Sarsat.
Cospas-Sarsat is in the process of establishing an international 406 MHz
emergency beacon registration database that would be available to all beacon
owners that have no place to register their beacon. This database is expected to be
available via the Internet in December 2005.
Who should I list as an emergency point of contact on my 406 MHz
emergency beacon registration form?
You should list family
and/or friends that can be easily contacted (e.g., carry a cell phone, or are
usually available at work or at home) and would have knowledge about where you
sail or fly.
Why do I have to re-new my registration every two
years?
The registration information
you provide is used to help you in case of an emergency. Therefore, the information has to be
current and accurate. The
International Maritime Organization (IMO) recommends that registration
information be updated periodically.
Nationally, the Federal Communications Commission (FCC) requires that
406 MHz EPIRB owners “advise NOAA in writing upon change of vessel or
EPIRB ownership, transfer of EPIRB to another vessel, or any other change in
registration information.”
Furthermore, the FCC requires that “aircraft owners shall advise
NOAA in writing upon change of aircraft or ELT ownership, or any other change
in registration information. Fleet operators must notify NOAA upon transfer of
ELT to another aircraft outside of the owners control, or an other change in
registration information.”
More importantly, accurate registration information could help save your
life.
What do I do if I lend my emergency beacon to
someone?
That depends on how
frequently you lend your beacon and for how long you lend your beacon. If you frequently lend your beacon to
someone else or its used on another vessel you may wish to note this fact under
the “ADDITIONAL DATA” section of the registration form. The same holds true if you lend you
beacon to someone for an extended period.
If this occurs infrequently or only for a short time you should update
your registration via the web-based registration database (www.beaconregistration.noaa.gov). In these cases, adding an email address
is important so that you are immediately notified when the registration is
updated.