<s>
The	O
Carl	O
Zeiss	O
Lotfernrohr	B-Device
7	I-Device
(	O
Lot	O
meant	O
"	O
Vertical	O
"	O
and	O
Fernrohr	O
meant	O
"	O
Telescope	O
"	O
)	O
,	O
or	O
Lotfe	O
7	O
,	O
was	O
the	O
primary	O
series	O
of	O
bombsights	B-Application
used	O
in	O
most	O
Luftwaffe	O
level	O
bombers	O
,	O
similar	O
to	O
the	O
United	O
States	O
 '	O
Norden	B-Device
bombsight	I-Device
,	O
but	O
much	O
simpler	O
to	O
operate	O
and	O
maintain	O
.	O
</s>
<s>
Several	O
models	O
were	O
produced	O
and	O
eventually	O
completely	O
replaced	O
the	O
simpler	O
Lotfernrohr	O
3	O
and	O
BZG	O
2	O
bombsights	B-Application
.	O
</s>
<s>
A	O
member	O
of	O
the	O
German	O
Duquesne	O
Spy	O
Ring	O
,	O
Herman	O
W	O
.	O
Lang	O
,	O
who	O
had	O
been	O
employed	O
by	O
the	O
Carl	O
L	O
.	O
Norden	O
Corporation	O
(	O
manufacturers	O
of	O
the	O
Norden	B-Device
bombsight	I-Device
)	O
,	O
was	O
able	O
to	O
provide	O
vital	O
details	O
of	O
the	O
new	O
bombsight	B-Application
to	O
the	O
Abwehr	O
.	O
</s>
<s>
In	O
the	O
Lotfe	O
7	O
,	O
a	O
similar	O
set	O
of	O
gyroscopes	O
provided	O
a	O
stabilized	O
platform	O
for	O
the	O
bombardier	O
to	O
sight	O
through	O
,	O
although	O
the	O
more	O
complex	O
interaction	O
between	O
the	O
bombsight	B-Application
and	O
autopilot	O
of	O
the	O
Norden	O
was	O
not	O
used	O
.	O
</s>
<s>
The	O
bombardier	O
would	O
first	O
locate	O
the	O
target	O
in	O
the	O
bombsight	B-Application
and	O
continue	O
to	O
adjust	O
the	O
dials	O
until	O
it	O
remained	O
motionless	O
in	O
the	O
eyepiece	O
.	O
</s>
<s>
This	O
allowed	O
the	O
bombsight	B-Application
to	O
calculate	O
the	O
wind	O
speed	O
from	O
the	O
cancelled	O
out	O
drift	O
rate	O
,	O
which	O
in	O
turn	O
allowed	O
to	O
make	O
an	O
accurate	O
calculation	O
of	O
groundspeed	O
.	O
</s>
<s>
The	O
bombsight	B-Application
could	O
be	O
used	O
against	O
targets	O
90°	O
to	O
40°	O
in	O
front	O
of	O
the	O
aircraft	O
,	O
and	O
up	O
to	O
20°	O
on	O
either	O
side	O
.	O
</s>
<s>
On	O
final	O
approach	O
,	O
the	O
autopilot	O
was	O
engaged	O
,	O
while	O
the	O
bombsight	B-Application
adjusted	O
the	O
flight	O
path	O
in	O
response	O
to	O
last-minute	O
changes	O
by	O
the	O
bombardier	O
.	O
</s>
<s>
In	O
the	O
case	O
of	O
the	O
single-seat	O
Ar	O
234	O
,	O
the	O
bombsight	B-Application
was	O
difficult	O
to	O
access	O
,	O
so	O
the	O
autopilot	O
was	O
engaged	O
first	O
,	O
allowing	O
the	O
pilot	O
to	O
remove	O
the	O
control	O
yoke	O
and	O
access	O
the	O
bombsight	B-Application
.	O
</s>
