4.5.1 A seat shall be provided for each passenger
and crew member for which the craft is certified to carry. Such seats
shall be arranged in enclosed spaces.
4.5.2 Seats fitted in addition to those required
under 4.5.1 and which are not permitted to be used in hazardous navigational
situations or potentially dangerous weather or sea conditions need
not comply with 4.5 or 4.6. Such
seats shall be secured according to 4.4.4 and
clearly identified as not being able to be used in hazardous situations.
4.5.3 The installation of seats shall be such
as to allow adequate access to any part of the accommodation space.
In particular, they shall not obstruct access to, or use of, any essential
emergency equipment or means of escape.
4.5.4 Seats and their attachments, and the structure
in the proximity of the seats, shall be of a form and design, and
so arranged, such as to minimize the possibility of injury and to
avoid trapping of the passengers after the assumed damage in the collision
design condition according to 4.4.1.
Dangerous projections and hard edges shall be eliminated or padded.
4.5.5 Seats, seat belts, seat arrangements and
adjacent parts such as tables shall be designed for the actual collision
design acceleration as specified in 4.3.4.
4.5.6 All seats, their supports and their deck
attachments shall have good energy-absorbing characteristics and shall
meet the requirements of annex 10.