US drone flights hit technical & military turbulence

Government efforts to get civilian and commercial drones off the ground in the US suffer setbacks due to technical issues and coordination with defense officials. Thus a September 2015 deadline set by lawmakers will not be met.
Amid mounting pressure to open the American skies to drone
technology, the Federal Aviation Administration is perplexed over
how to handle a number of related issues, including the question
as to what kind of detection system should be used to prevent
in-air collisions with other aircraft, or how to maintain
communications with ground control stations, Matthew Hampton, the
Transportation Department's assistant inspector general for
aviation, said in a report.
The FAA forecasts there will be around 7,500 active Unmanned
Aircraft Systems (UAS) hovering above US skies in five years,
with over $89 billion invested in drone technologies worldwide
over the next decade. Drones range from radio-controlled model
airplanes to those with the wingspan of a commercial airliner.
Presently, air traffic controllers, who guide hundreds of
aircraft across US airspace each day, are not equipped to work
with unmanned aircraft. At the same, no standards have been put
in place to train ‘pilots’ of the vehicles.
Meanwhile, the FAA is getting little by way of cooperation from
the US Defense Department, by far the largest user of unmanned
aerial technologies which has experienced a number of drone
accidents over the years.
In August 2010, for example, the Navy caused quite a stir when it
temporarily lost contact with a Fire Scout drone, a 31-foot-long,
10-foot-high surveillance aircraft, which resulted in the vehicle
flying into restricted airspace surrounding Washington, DC.

Eventually the Navy was able to reestablish contact with the
drone and fly it back to base.
The FAA requested more detailed information from the Defense
Department on such incidents more than two years ago, but
Pentagon officials have declined to comply "due to concerns
regarding the release of sensitive information and uncertainty
over who would bear the cost of retrieving the information,"
the report said.
Until the FAA resolves such issues, its efforts to introduce
drones into the national airspace "will continue to move at a
slow pace, and safety risks will remain," the report added.
Meanwhile, the FAA defended itself against detractors who accused
the government watchdog of dragging its feet in clearing drones
for taking to the skies.
The FAA "has made significant progress" toward opening
US skies "even as it dealt with disruptions," which
included spending cuts and a partial government shutdown.
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Three weeks ago, the FAA granted the first permission for commercial drone flights over US territory to BP and drone producer AeroVironment to use a Puma drone to inspect pipelines and roads at Prudhoe Bay, Alaska.