<s>
Plane	B-Application
Finder	I-Application
is	O
a	O
United	O
Kingdom-based	O
real-time	O
flight	O
tracking	O
service	O
launched	O
in	O
2009	O
,	O
that	O
is	O
able	O
to	O
show	O
flight	O
data	O
globally	O
.	O
</s>
<s>
Several	O
variants	O
of	O
the	O
service	O
are	O
available	O
as	O
mobile	B-Application
apps	I-Application
including	O
free	O
,	O
premium	O
3D	O
and	O
augmented	O
reality	O
versions	O
.	O
</s>
<s>
Plane	B-Application
Finder	I-Application
allows	O
registered	O
users	O
to	O
share	O
their	O
ADS-B	B-Application
and	O
MLAT	O
data	O
via	O
the	O
Plane	B-Application
Finder	I-Application
ADS-B	B-Application
Client	O
,	O
available	O
for	O
macOS	B-Application
,	O
Windows	B-Application
and	O
Linux	B-Application
.	O
</s>
<s>
Plane	B-Application
Finder	I-Application
supports	O
VFR	O
charts	O
from	O
NATS	O
and	O
was	O
the	O
first	O
major	O
flight	O
tracking	O
app	O
to	O
introduce	O
a	O
replay	O
feature	O
,	O
allowing	O
users	O
to	O
replay	O
flights	O
dating	O
back	O
to	O
2011	O
.	O
</s>
<s>
Plane	B-Application
Finder	I-Application
collects	O
data	O
from	O
its	O
own	O
global	O
network	O
of	O
receivers	O
,	O
using	O
the	O
following	O
sources	O
.	O
</s>
<s>
A	O
network	O
of	O
automatic	B-Application
dependent	I-Application
surveillance-broadcast	I-Application
(	O
ADS-B	B-Application
)	O
receivers	O
gathers	O
aircraft	O
data	O
such	O
as	O
callsign	O
,	O
position	O
and	O
speed	O
.	O
</s>
<s>
Plane	B-Application
Finder	I-Application
serves	O
supplement	O
this	O
data	O
with	O
additional	O
information	O
,	O
including	O
aircraft	O
registration/tail	O
number	O
,	O
departure	O
airport	O
,	O
destination	O
,	O
artwork	O
,	O
and	O
photographs	O
.	O
</s>
<s>
Plane	B-Application
Finder	I-Application
users	O
can	O
apply	O
for	O
an	O
ADS-B	B-Application
receiver	O
in	O
exchange	O
for	O
their	O
flight	O
data	O
.	O
</s>
<s>
To	O
deliver	O
aircraft	O
position	O
data	O
where	O
ADS-B	B-Application
is	O
unavailable	O
,	O
Plane	B-Application
Finder	I-Application
uses	O
multilateration	O
(	O
MLAT	O
)	O
.	O
</s>
<s>
Using	O
three	O
or	O
more	O
receivers	O
running	O
Plane	B-Application
Finder	I-Application
client	O
software	O
,	O
monitoring	O
the	O
aircraft	O
simultaneously	O
,	O
the	O
aircraft	O
’s	O
position	O
is	O
calculated	O
using	O
receiver	O
location	O
and	O
accurate	O
timestamps	O
.	O
</s>
<s>
ADS-B	B-Application
is	O
prevalent	O
across	O
Europe	O
and	O
Australia	O
,	O
but	O
not	O
in	O
North	O
America	O
.	O
</s>
<s>
Where	O
MLAT	O
or	O
ADS-B	B-Application
data	O
is	O
unavailable	O
,	O
a	O
feed	O
from	O
the	O
Federal	O
Aviation	O
Administration	O
provides	O
flight	O
information	O
.	O
</s>
<s>
Plane	B-Application
Finder	I-Application
collects	O
data	O
from	O
a	O
centralised	O
FLARM	O
feed	O
,	O
for	O
monitoring	O
small	O
aircraft	O
and	O
gliders	O
.	O
</s>
<s>
The	O
Plane	B-Application
Finder	I-Application
website	O
and	O
database	O
is	O
widely	O
used	O
as	O
an	O
information	O
source	O
to	O
support	O
articles	O
in	O
the	O
media	O
.	O
</s>
<s>
The	O
Independent	O
used	O
Plane	B-Application
Finder	I-Application
flight	O
tracking	O
to	O
demonstrate	O
to	O
readers	O
the	O
flight	O
path	O
of	O
flight	O
MT2706	O
,	O
which	O
turned	O
back	O
as	O
a	O
result	O
of	O
last	O
minute	O
Egyptian	O
government	O
flight	O
restrictions	O
on	O
6	O
November	O
2015	O
.	O
</s>
<s>
The	O
Independent	O
also	O
used	O
Plane	B-Application
Finder	I-Application
information	O
to	O
demonstrate	O
a	O
timeline	O
of	O
the	O
speed/altitude	O
of	O
flight	O
7K	O
9268	O
,	O
a	O
Russian	O
plane	O
which	O
crashed	O
on	O
31	O
October	O
2015	O
.	O
</s>
<s>
The	O
BBC	O
cited	O
Plane	B-Application
Finder	I-Application
in	O
regard	O
to	O
the	O
point	O
at	O
which	O
at	O
British	O
Airways	O
flight	O
turned	O
back	O
to	O
Heathrow	O
Airport	O
to	O
make	O
an	O
emergency	O
landing	O
after	O
smoke	O
was	O
seen	O
coming	O
from	O
its	O
engines	O
.	O
</s>
<s>
Plane	B-Application
Finder	I-Application
data	O
has	O
also	O
been	O
used	O
to	O
create	O
original	O
imagery	O
for	O
the	O
media	O
,	O
such	O
as	O
the	O
Washington	O
Post	O
,	O
which	O
used	O
Plane	B-Application
Finder	I-Application
as	O
a	O
source	O
to	O
show	O
flight	O
patterns	O
immediately	O
after	O
the	O
Brussels	O
bombings	O
in	O
March	O
2016	O
.	O
</s>
