be restored to normal. This is accomplished by
the anti-g garment.
With the anti-g system, compressed air is
metered to the garment in proportion to the
gravitational force being exerted. The bladders of
the garment inflate, compressing the legs and
abdomen of the wearer by an amount also
proportional to the gravitational force. Thus, the
garment prevents blood collecting in the abdomen
and lower extremities and forces blood from the
lower to the upper part of the body. This
effect increases blood flow to the heart and
increases resistance to the shifting of blood
to the lower limbs. In addition, it raises the
diaphragm, decreasing the distance between the
heart, the eyes, and the brain. Altogether, it
increases the tolerance of the pilot an average of
about 2 gs.
Without an anti-g garment, the average pilot
can withstand 4.5 to 5.5 gs without losing vision
or blacking out. With a garment, he is capable
of withstanding 6.0 to 7.0 gs. However, this
protection is available only for sustained
accelerations of 4 to 5 seconds or longer in
maneuvers other than snap maneuvers.
Anti-g equipment does not offer protection in
snap maneuvers where 10 to 12 gs can be applied
in approximately 1 second. Such brief forces are
not as harmful to the body as lesser forces
sustained for a number of seconds.
CSU-15/P ANTI-G GARMENT
The CSU-15/P anti-g garment (fig. 4-11)
consists of a fire-resistant Aramid cloth outer
shell, which houses a bladder. It is cut away at
the buttocks, groin, and knees. The outer shell
has waist and leg entrance slide fasteners, six
adjustment lacing areas with lacing covers, and
two easily detached leg pockets with slide fastener
closures. The bladder system is constructed of
polyurethane-coated nylon cloth and covers the
abdomen, thighs, and calves. The bladder system
is fitted with a hose for connecting directly to the
aircraft anti-g system. This anti-g garment is
available in six sizes.
CSU-15/P anti-g garments are issued to
individual aircrew members, and are used in
conjunction with standard Navy personal
Fitting the CSU-15/P Anti-g Garment
The CSU-15/P anti-g garment is fitted and ad-
justed to the aircrew member on a best-fit basis.
Figure 4-11.CSU-15/P anti-g garment.
The cords are laced in the same direction
as the applicable lacing slide fastener closure.
With a proper fit, the lace adjustment should
be tightened approximately halfway, and the
cutout should expose the knees, groin, and
buttocks without binding or hindering movement.
The garment should fit snugly, but not tight, with
the bladder deflated. The inflated bladder should
compress the waist, thighs, and calves firmly and
With bladder deflated, lace adjustments are
tightened to provide a snug (not tight) comfortable
fit, especially at the waist.