Air France 447 - 'Black box' firm hopes to recover AF447 device
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(CNN) -- A top executive for the company which built the "black box" aboard Air France Flight 447 says he hopes his firm's 100 percent recovery record from air accidents will be maintained despite fears the device may be lost at the bottom of the Atlantic Ocean.
A Brazilian diver floats on wreckage of Flight 447 spotted Wednesday.
A French nuclear submarine and other vessels are searching for the flight data recorder by attempting to trace its underwater locator beacon; a device which sends acoustic pulses, or "pings," to searchers.
The U.S. Navy has contributed two high-tech acoustic devices -- known as "towed pinger locators" -- which have been attached to French tug boats and can search to a maximum depth of 20,000 feet.
Honeywell Aerospace's Paolo Carmassi -- the firm's president for Europe, the Middle East, Africa and India -- told CNN that retrieving the flight data could help solve the mystery of the plane's fate and said his company had never lost a black box involved in an accident.
"We believe that our technology is well-positioned to, in this case, contribute to solve the big question around this particular accident," Carmassi said.
"We have a 100 percent recovery rate of all the black boxes that we have installed that unfortunately may have been involved in accidents so we hope that we will be able to maintain our record and be able to shed some light on what happened." 
Watch what clues investigators are looking at »
But Carmassi admitted it was hard to estimate how much battery life the locator beacon had left.
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"There is a certain duration which depends on the particular environmental conditions, whether it's underwater or on land, whether it's at 10 meters or 4,000 meters so it's very difficult to pinpoint exactly the duration," he said.
Yann Cochennec, an aviation expert for Air et Cosmos magazine, told CNN that a black box had been retrieved from the seabed in 2004 after an Egyptian charter flight crashed into the Red Sea shortly after leaving Sharm el-Sheikh.
But he said the depth of the Atlantic, strong currents and bad weather would make retrieving the box from the Air France wreckage far more difficult.
The "black box" is actually an orange cylinder -- about 13 pounds of metal wrapped around a stack of memory chips and designed to survive high temperatures, strong impact and tons of pressure.
The devices -- which record virtually every detail about how an airplane is working including air pressure, the plane's speed and altitude, how much fuel a plane has and whether that fuel is flowing properly -- have played a crucial part in air crash investigations since they were first fitted to commercial aircraft in the 1940s.
