spartans_in_darkness

'fO" SEe~E'flieOMII~'fIiX 1
semifixed intercept site in the host unit base
camp.
(U) A soldier ftom the 407th RRD mans an
AN/PRD-1 short range direction linding position
in a lield ofelephantgrass.
(£//8I) When the host unit, either a division
or independent brigade, deployed to the field, it
usually did so in brigade or battalion-sized formations,
more often the latter. This deployed unit
moved out from its base camp and could stay in
the field for several weeks. To support the
deployed unit, the DSUwould create a mobile element,
which would be transported by helicopter
to the host unit's command post. This DSU
detachment would provide air-to-ground communications
for any ARDF aircraft supporting
the operation, a ground-based SRDF capability
(with the PRD-I), and limited manual morse (and
later voice) intercept. Sometimes, the PRD-1
would be loaded on board a helicopter in a kind of
quick-fix D/F capability. Generally, companysized
DSUs operated four "stabilized," that is,
semifixed, positions from its base camp, while
one position was in a mobile configuration.
Detachments, as a practice, kept two positions in
a base camp and one free for mobile operations.
(S//~I) The first ASA DSU arrived in South
Vietnam in June 1965. This was the 404th Radio
Research Detachment in support of the 173rd
Airborne Brigade. The table on the next page is a
list, though not necessarily complete, of ASA
direct support units which arrived in South
Vietnam
between
June 1965
and July
1968.
(U) Aerial
view ofbase for
337th RRC,
Di An, the
DSU for the
u.s. 1st Infantry
Division
Page 290
'fOP SEeRE'f#eOMIN'f#Xl