4.2.1
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(a) A seat should be provided for each passenger
that the dynamically supported craft is certified to carry. The Administration
should specify which crew members are to be provided with a seat.
No sleeping berth accommodation should be provided unless the Administration
has made a comprehensive review of the Fire Safety Measures and Evacuation
Procedures.
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(b) Seats should be of a form and design such
as to minimize the possibility of injury and to avoid trapping of
the occupants particularly in emergency conditions. Dangerous projections
and hard edges should be eliminated.
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(c) Adjustable, folding or rotatable seats, if
fitted, should be provided with locking mechanisms which should be
designed so as to lock automatically in either the stowed or ready
positions when the control is released.
4.2.2 Seats should not move or distort under normal
service conditions. They may, however, distort under abnormal loads,
in which case the risk of injury to occupants or persons thrown against
them should be minimized.
4.2.3 The installation of seats should be such
as to allow adequate access to any part of the accommodation space.
In particular, they should not obstruct access to, or use of, any
essential or emergency equipment or required means of escape.
4.2.4
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(a) Safety belts should be provided for all seats
from which the craft may be operated unless it is demonstrated to
the satisfaction of the Administration that they are unnecessary.
Administrations should consider the need to provide safety belts for
other persons on board the craft having regard to other protection
and the accelerations likely to be experienced.
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(b) Safety belts, when correctly adjusted, should
prevent the wearer's head and trunk from coming into contact with
potentially dangerous objects under normal and emergency conditions.
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(c) Safety belts and their attachments should
be sufficiently strong to withstand the loads likely to arise due
to a collision.