<s>
Royal	O
Air	O
Force	O
Buchan	O
or	O
more	O
simply	O
RAF	B-Algorithm
Buchan	I-Algorithm
is	O
a	O
former	O
Royal	O
Air	O
Force	O
station	O
near	O
Peterhead	O
in	O
Aberdeenshire	O
,	O
Scotland	O
.	O
</s>
<s>
Buchan	O
opened	O
in	O
1952	O
as	O
a	O
radar	O
centre	O
in	O
the	O
ROTOR	B-Application
radar	O
network	O
.	O
</s>
<s>
During	O
the	O
upgrades	O
to	O
the	O
Linesman/Mediator	O
network	O
it	O
was	O
planned	O
to	O
close	O
,	O
but	O
its	O
location	O
and	O
support	O
for	O
air	B-Application
traffic	I-Application
control	I-Application
kept	O
it	O
operational	O
with	O
its	O
Type	O
80	O
through	O
this	O
era	O
.	O
</s>
<s>
As	O
part	O
of	O
this	O
upgrade	O
,	O
it	O
received	O
an	O
AMES	B-Application
Type	I-Application
92	I-Application
radar	O
although	O
its	O
Type	O
80	O
continued	O
operations	O
for	O
some	O
time	O
before	O
finally	O
shutting	O
down	O
in	O
1993	O
along	O
with	O
its	O
associated	O
Sperry	O
TPS-34	O
height	B-Algorithm
finders	I-Algorithm
.	O
</s>
<s>
Around	O
the	O
same	O
time	O
,	O
Buchan	O
became	O
parent	O
station	O
for	O
RAF	B-Algorithm
Saxa	I-Algorithm
Vord	I-Algorithm
in	O
Shetland	O
(	O
91	O
Signals	O
Unit	O
)	O
and	O
RAF	B-Algorithm
Benbecula	I-Algorithm
(	O
71	O
Signals	O
Unit	O
)	O
in	O
the	O
Outer	O
Hebrides	O
,	O
both	O
of	O
which	O
were	O
downgraded	O
to	O
reporting	O
posts	O
which	O
feed	O
data	O
into	O
the	O
UKASACS	O
.	O
</s>
<s>
In	O
May	O
2000	O
the	O
Ministry	O
of	O
Defence	O
announced	O
the	O
downgrading	O
of	O
RAF	B-Algorithm
Buchan	I-Algorithm
from	O
a	O
manned	O
station	O
to	O
a	O
remote	O
radar	O
head	O
and	O
that	O
RAF	O
Boulmer	O
in	O
Northumberland	O
and	O
RAF	O
Neatishead	O
in	O
Norfolk	O
,	O
would	O
continue	O
to	O
operate	O
the	O
surveillance	O
and	O
control	O
system	O
.	O
</s>
<s>
Manned	O
operations	O
formally	O
ceased	O
at	O
RAF	B-Algorithm
Buchan	I-Algorithm
on	O
26	O
November	O
2004	O
and	O
the	O
domestic	O
site	O
was	O
officially	O
downsized	O
on	O
31	O
March	O
2005	O
.	O
</s>
