<s>
Trailing	B-Device
cones	I-Device
(	O
or	O
trailing	B-Device
wires	I-Device
as	O
they	O
are	O
often	O
incorrectly	O
called	O
or	O
trailing	O
static	O
cones	O
)	O
,	O
were	O
first	O
developed	O
and	O
tested	O
in	O
the	O
1950s	O
and	O
1960s	O
as	O
a	O
simple	O
means	O
of	O
calibrating	O
the	O
static	O
pressure	O
(	O
altitude	O
reporting	O
)	O
error	O
of	O
an	O
aircraft	O
's	O
pitot-static	O
system	O
.	O
</s>
<s>
The	O
trailing	B-Device
cone	I-Device
system	O
trails	O
at	O
least	O
one	O
fuselage	O
length	O
behind	O
the	O
aircraft	O
(	O
SpaceAge	O
Control	O
)	O
via	O
a	O
high-strength	O
pressure	O
tube	O
.	O
</s>
<s>
Trailing	B-Device
cone	I-Device
.	O
</s>
