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16.1 O
BSTRUCTED ENVIRONMENTS
Dives in such environments are already
VERY DANGEROUS.
INCORRECT USE OF THE ADV IN SUCH ENVIRONMENTS INCREASES THE
DIVING HAZARDS.
For example: if the control valves are hit accidentally whilst
travelling at high speeds, these may break, with obvious consequences.
DIVING IN
SUCH ENVIRONMENTS REQUIRES ADEQUATE TRAINING BY QUALIFIED
AGENCIES
. It is hereby emphasized that the running time of both the ADV and the
breathing gas must be planned in such a manner that every team member has TWICE
the necessary resources available. It is also obligatory to carry another extra ADV.
16.2 M
UDDY OR SUSPENSION
-
FILLED ENVIRONMENTS
These include those environments, obstructed or otherwise, in which visibility may
suddenly fall to zero due to the suspension that is created by moving the bed sediment.
Dives in these environments are already
VERY DANGEROUS. INCORRECT USE OF
THE ADV IN SUCH ENVIRONMENTS INCREASES THE DIVING HAZARDS.
DIVING IN SUCH ENVIRONMENTS REQUIRES ADEQUATE TRAINING BY
QUALIFIED AGENCIES.
For example: the rotating propeller that faces downwards can lift a considerable amount
of suspension.
Accidental activation of an emergency ADV in tow may create highly critical
situations.
17
P
OSITIONS AND BEHAVIOURS TO BE AVOIDED WHEN
DIVING
The diver’s head or other body parts should never be beyond the
propeller conveyor (5) (see fig. 1) where flow is suctioned.
Do not direct the flow from the conveyor at you. This thwarts the
propulsion drive and could move your equipment away from you.
Do not ride the ADV.
Do not attach the ADV to your tanks or their supports in any way.
Do not attach the ADV to your body, legs, arms or other parts in any way.
Do not use more than one ADV simultaneously.
Do not start the ADV with body parts other than your right hand.
When using the ADV, always keep your left hand far from the propeller, better is resting
against your body, on your side, or on your right hand to more comfortably control the
ADV.
Do not direct propeller flow at the sea bottom to avoid raising sand or mud.
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