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Anti-submarine belts or "crotch straps"
are designed to restrict the driver's
downward movement in the seat. Without
the crotch strap, the driver can be forced
to "submarine" through the harness in
an accident. In this photo, we have a
double crotch strap that is an upgraded
arrangement (over and above a single strap).
As you can see, it too attaches to the
quick release.
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ANTI-SUBMARINE BELTS
There are several different crotch straps on
the market, including a single crotch strap
or a pair of anti-submarine belts. The single
crotch strap is simply a lone belt that fastens
to the floor at the base of the seat (between
the driver's legs). While the single crotch
strap is simple and effective, some racers and
manufacturers feel that the double anti-submarine
belts provide superior protection. These belts
include the single crotch strap but also include
a pair of straps that go under the thigh and
attach to the same floor mount as the seat belt.
The purpose? To keep the driver from slipping
under the harness in the event of a mishap.
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Adjusters can be specified
in two different configurations-pull down
or pull up. Using either type of adjuster
boils down to a matter of personal preference
along with the equipment used in the car.
As an example, if you adjust the belt yourself,
then one style of adjuster is preferred.
This can change if a race car crew member
handles the belt tightening duties. Basically
it's easier for a crew member to pull up
on the adjuster in some cars while in others,
it's easier for you to pull down. |
THE BOTTOM LINE
Seat belts and associated harnesses are not
insignificant components in your race car. As
a matter of normal maintenance, all webbing,
mounts and hardware should be carefully inspected.
Make a point to inspect your equipment on a
regular basis and if anything is even slightly
suspect, replace it immediately (if you're a
dedicated racer, and it means missing a race,
then do so -- don't take a chance on suspect
components). Tighten your belts until they hurt.
They'll loosen soon enough. The only real way
to survive a potential crash is to prepare for
the worst.
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