Weight belts are made of
synthetic fibers or rubber and are fastened by a buckle which can be easily
unbuckled in case of emergency. One kilogram weights are strung up on to
compensate the negative buoyancy.
Did you know : Rubber weight
belts are used in deep dives because the body is exposed to great water
pressure and it shrinks. Rubber is elastic and it shrinks too. Thus, the
belt cannot loosen from the waist.
They are quite important
and useful in case of emergency. It is recommended that every diver carries
a knife. The underwater knives have different shapes but all have a comfortable
rubber or plastic handle. They can be carried either on the leg near the
ankle, the tight or on the waist.
These are special watches
with a high resistance to pressure and glowing ciphers.
These are electronic devices
that can give the exact depth at which the diver is.
It is of significant help
to underwater navigation especially when there is low visibility. The underwater
compass is actually a magnetic compass put in a water- and pressure-proof
case. It is worn on the wrist like a watch.
It can be made of a sand-papered
piece of acrylic plastic and used with a pencil. Semimatte plastic sheets
can be bought and used in the same way for writing down information.
These are different kinds
of torches or lamps which are pressure- and water-proof. They usually have
neutral or slightly positive buoyancy.
Signal devices are used
when a diver surfaces away from the ship. They emit light and release smoke.
They are made of synthetic
fibers and are used to assist the diver in a cave, under ice or into a
strong current. They link the diver with the surface crew or with another
They signal the location
of the diver to the surface crew or the passing boats. They should carry
the diver’s flag.
These are employed in emergency
rescues of divers. They are produced in different shapes and sizes but
it is important that all of them keep the face of the unconscious diver
out of the water when he surfaces. Every diver must be trained how to use
the flotation device he is wearing in order to prevent himself from a quick
ascent which may cause decompression sickness. The
flotation devices are usually inflated by a cylinder full of carbon dioxide
attached to them or with air from the scuba cylinder.
Underwater communication devices
is achieved through different kinds of hardwire, acoustic or non-acoustic
wireless systems. They allow the diver (if he is with a helmet) to talk
to his team. They can’t be used with wet and dry suits.
Underwater means of fast movement
These are devices which
divers use to swim quickly and without any effort and waste of energy.
They are produced with on or two engines and there are some models which
can carry two or three divers. For covering greater distances, wet submarines
are used. They are called “wet” because the diver stays in water.
They keep the diver from the current which the moving device creates. The
can carry equipment and can have a stationary breathing system.
Decompression chambers are
used for decompression of divers who have just left the water after a deep
dive or are about to enter straight into great depths. The decompression
chamber can be a single-seated or many-seated and usually has an oval shape.
Most of the chambers mounted on a ship or near the diving spot are charged
with breathing gases from scuba cylinders. It can be also used for recompression
o f divers.
This device is employed
in laboratories and medical centers to treat divers suffering from decompression
sickness. The diver is placed in the chamber where the pressure is increased
to the depth at which the gas bubbles have started to form. Then, the pressure
is slowly decreased so that complete desaturation takes place.
concerns all of the above without the chambers)
1. All equipment which
has been in salt water must be washed with fresh water!
2. The rubber parts
of the equipment must not be exposed to the sun.
3. Rubber must be
occasionally washed with soap!
4. Equipment should
be kept in a dry place.
5. Rubber parts should
be covered with talcum if they are not going to be used for a long time
6. Some metal pieces
of equipment, like knives, regulators, valves, etc. should be oiled at