| Sleeping Provisions
Sleeping provisions for flight crew members consist of sleeping
bags, sleep restraints or rigid sleep stations. The sleeping arrangements
can consist of a mix of bags and sleep restraints or rigid sleep
stations on a given mission. During a mission with one shift, all
crew members sleep simultaneously. If all crew members sleep simultaneously,
at least one crew member will wear a communication headset to ensure
reception of ground calls and orbiter caution and warning alarms.
If sleeping bags are used, they are installed on the starboard
middeck wall and deployed for use on orbit.
If the rigid sleep station is used on a mission, it is installed
on the starboard side of the middeck. There are two types of rigid
sleep stations. One sleep station type accommodates three crew members
and the other accommodates four.
If the rigid sleep station is not installed for a mission, a sleeping
bag is furnished each crew member. Each sleeping bag contains a
support pad with adjustable restraining straps and a reversible/removable
pillow and head restraint. Apollo sleeping bags may be provided
for the crew members on request. The Apollo sleeping bag is constructed
of beta material and is perforated for thermal comfort.
Six adjustable straps permit the sleeping bag to be adjusted to
its proper configuration. Three helical springs above the adjustable
straps on one side of the bay relieve loads exerted by the crew
member on the crew compartment structure. Six pip pins allow the
bag to be attached to the middeck locker face in either a horizontal
or vertical configuration. Two elastic adjustable straps restrain
the upper and lower parts of the body in the bag. Velcro strips
on the ends of both sides of the head restraint attach it to the
pillow. A double zipper arrangement permits the sleeping bag to
be opened and closed from the bottom to the top of the bag. One
zipper on each side of the sleeping bag allows the bag to be attached
to a support pad for better rigidity.
The Apollo beta cloth sleeping bag has four adjustable straps with
pip pins that are connected to any two lockers in the middeck separated
by a distance equal to a four-tiered locker configuration. For torso
restraint, a single two-piece strap is provided and a single zipper
opens the bag. The bags are stowed in a middeck locker during launch
A sleep kit is provided for each crew member and is stowed in the
crew member's clothing locker during launch and entry. Each kit
contains eye covers and ear plugs for use as required during the
The three- or four-tier rigid sleep stations contain a sleeping
bag, personal stowage provisions, a light and a ventilation inlet
and outlet in each of the tiers. The cotton sleeping bag is installed
on the ground in each tier and held in place by six spring clips.
The light in each tier is a single fluorescent fixture with a brightness
control knob and an off position. The air ventilation inlet duct
is an air diffuser similar to an automobile ventilation duct. It
is adjusted by moving the vane control knob. The air ventilation
outlet duct is located in the fixed panel at each tier and is opened
or closed by moving the vane control knob. The air inlet is located
at the crew member's head. The outlet is at the feet. All crew members'
heads are toward the airlock and their feet toward the avionics bay.
In the three-tier configuration, the upper and middle crew members
face the ceiling and the lower tier crew member faces the floor.
The fixed panel at the lower sleep station is removable to provide
access to the cabin debris trap door for cleaning the cabin filter,
to gain access to floor locker MD76C and to enter the forward portion
of the lower equipment bay to clean the avionics bay fan filter.
In the four-tier configuration, the bottom tier sleep restraint
hookup provision allows the crew member to position himself at a
15-degree angle, which provides more room, or in the normal horizontal
position. The sleeping bag, personal stowage provisions, light and
ventilation inlet and outlet are the same as in the three-tier configuration.
The head and feet orientations of the crew members are also the
same as in the three-tier configuration. The lowest tier is removable
so access can be obtained to the cabin debris trap door to clean
the cabin filter, gain access to floor locker MD76C and enter the
forward portion of the lower equipment bay to clean the avionics
bay fan filter.
The three-tier rigid sleep station is made of plastic honeycomb
panel and weighs approximately 205 pounds. The four-tier rigid sleep
station is made of metal and weighs 173 pounds.
A 24-hour period is normally divided into an eight-hour sleep period
and a 16-hour wake period for each crew member. Forty-five minutes
are allocated for the crew members to prepare for the sleep period
and another 45 minutes when they awake to wash and get ready for