4.5.1 A seat should be provided for each passenger
and crew member for which the craft is certified to carry.
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 should be secured according
to 4.4.5 and clearly identified as not being able to be used in hazardous
situations.
4.5.3 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 emergency equipment or means of escape.
4.5.4 Seats and their attachments, and the structure
in the proximity of the seats, should 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 should be eliminated or padded.
4.5.5 Seat, seat belts, seat arrangement and adjacent
parts such as tables should be designed for the actual collision design
acceleration as specified in 4.3.3.
4.5.6 All seats, their supports and their deck
attachments should have good energy absorbing characteristics and
should meet the requirements of annex 9.