Home > ELTs
ACK Technologies, Inc.
This page includes several options in ELTs. They are a great way
to increase safety. Emergency Locator Transmitters (ELTs) are used to
help rescue crews find downed aircraft - increasing the likelihood of
survival for aircraft occupants - especially in remote areas.
The original ELTs introduced in 1973 were manufactured to the specifications
of FAA TSO-C91. In 1985, TSO-C91A was introduced to provide improved
performance and reliability. Today, C91 units are no longer allowed in new
installations. These first and second-generation units broadcast an analog
signal on 121.5 and 243.0 MHz. The latest technology utilizes a
frequency of 406 MHz. In November of 2000 the International
Corpas-Sarsat Program announced that it plans to cease the processing of
distress signals from 121.5 and 243 MHz beacons on February 1st, 2009.
Unfortunately, 406 ELTs are quite a bit more expensive than 121.5 ELTs.
Cospas-SARSAT is an international organization representing many governments
round the world in the management of the international distress beacon
network. The USA, Australia along with many other countries are signatures
and/or active parties to this organization.
For details see the links below.
One Glider Pilot's ELT Installation
The link below shows how one glider pilot (Jim Phoenex) mounted an AmeriKing
AK-450 ELT in his sailplane. He did an excellent job of documenting
it. Well done Jim!
Click on link
Click on image to see details
ELTs, 121.5 & 406.028 MHz