|
The search party
is unsure why they
have not been able
to reacquire the signal.
Dean said there could be many reasons. One possibility: "
They may have just caught the end of the battery life," Dean said.
There are other possible explanations:
the ocean environment can play havoc
with sound waves,
experts say.Experts do not appear overly concerned that the pings were detected at a frequency of 33.2 kHz, instead of the design frequency of 37.5."
We're listening a little bit on either side of that (37.5 kHz)
because pinger (frequencies) do drift,"
Dean said.The pingers did have the same pulse as the MH370 pingers
-- one ping per second.If the Ocean Shield can box in the pingers, the search area will be narrowed to within "a couple of hundred meters of the target,"
he Dean said. "Your search area gets smaller very quickly."That is an area that can be searched by the Bluefin-21 AUV,
the autonomous underwater vehicle.
But if the ship cannot reacquire the pings, the search area will be measured in "square miles," necessitating a much lengthier search,
Dean said."At this point, as tempting as it is to launch an AUV,
you really want to remain rigorous in running lines and seeing if you can reacquire a signal,"
he said.Last weekend's pinger detection has greatly narrowed the search,
said Van Gurley, a retired Navy captain and senior manager of Metron,
which assisted in the Air France 447 search.
The search can be narrowed to a five-mile radius,
Gurley said, "And it could be much less."
"This is not a 'years' thing anymore,"
he said of the search.
09-04-2014 om 08:38
geschreven door Michael Kors Outlet Online
|
