<s>
It	O
was	O
used	O
on	O
a	O
variety	O
of	O
ships	O
,	O
ranging	O
from	O
destroyers	B-Application
(	O
one	O
per	O
ship	O
)	O
to	O
battleships	B-Application
(	O
four	O
per	O
ship	O
)	O
.	O
</s>
<s>
The	O
Mark	O
37	O
system	O
used	O
tachymetric	B-Device
target	O
motion	O
prediction	O
to	O
compute	O
a	O
fire	O
control	O
solution	O
.	O
</s>
<s>
Using	O
the	O
range	O
finders	O
and	O
telescopes	O
for	O
bearing	O
and	O
elevation	O
,	O
the	O
director	O
was	O
able	O
to	O
produce	O
a	O
continuously	O
varying	O
set	O
of	O
outputs	O
,	O
referred	O
to	O
as	O
line-of-sight	O
(	O
LOS	O
)	O
data	O
,	O
that	O
were	O
electrically	O
relayed	O
to	O
the	O
Mark	O
1	O
via	O
synchro	B-Algorithm
motors	I-Algorithm
.	O
</s>
<s>
They	O
would	O
also	O
be	O
responsible	O
for	O
calculating	O
and	O
entering	O
the	O
average	O
muzzle	B-Application
velocity	I-Application
of	O
the	O
projectiles	O
to	O
be	O
fired	O
before	O
action	O
started	O
.	O
</s>
<s>
Given	O
these	O
inputs	O
,	O
the	O
Mark	O
1	O
automatically	O
computed	O
the	O
lead	O
angles	O
to	O
the	O
future	O
position	O
of	O
the	O
target	O
at	O
the	O
end	O
of	O
the	O
projectile	O
's	O
time	O
of	O
flight	O
,	O
adding	O
in	O
corrections	O
for	O
gravity	O
,	O
relative	O
wind	O
,	O
the	O
magnus	O
effect	O
of	O
the	O
spinning	O
projectile	O
,	O
and	O
parallax	B-Device
,	O
the	O
latter	O
compensation	O
necessary	O
because	O
the	O
guns	O
themselves	O
were	O
widely	O
displaced	O
along	O
the	O
length	O
of	O
the	O
ship	O
.	O
</s>
<s>
The	O
LOF	O
data	O
,	O
bearing	O
and	O
elevation	O
,	O
as	O
well	O
as	O
the	O
projectile	O
's	O
fuze	O
time	O
,	O
was	O
sent	O
to	O
the	O
mounts	O
by	O
synchro	B-Algorithm
motors	I-Algorithm
,	O
whose	O
motion	O
actuated	O
hydraulic	O
servos	O
with	O
excellent	O
dynamic	O
accuracy	O
to	O
aim	O
the	O
guns	O
.	O
</s>
<s>
While	O
these	O
fire	O
control	O
systems	O
greatly	O
improved	O
the	O
long-range	O
accuracy	O
of	O
ship-to-ship	O
and	O
ship-to-shore	O
gunfire	O
,	O
especially	O
on	O
heavy	O
cruisers	O
and	O
battleships	B-Application
,	O
it	O
was	O
in	O
the	O
anti-aircraft	O
warfare	O
mode	O
that	O
the	O
Mark	O
1	O
made	O
the	O
greatest	O
contribution	O
.	O
</s>
<s>
The	O
design	O
of	O
the	O
postwar	O
Mark	O
1A	O
may	O
have	O
been	O
influenced	O
by	O
the	O
Bell	O
Labs	O
Mark	B-Device
8	I-Device
,	O
which	O
was	O
developed	O
as	O
an	O
all	O
electrical	O
computer	O
,	O
incorporating	O
technology	O
from	O
the	O
M9	O
gun	B-Device
data	I-Device
computer	I-Device
as	O
a	O
safeguard	O
to	O
ensure	O
adequate	O
supplies	O
of	O
fire	O
control	O
computers	O
for	O
the	O
USN	O
during	O
WW2	O
.	O
</s>
