4.3.2.1 The buoyancy of the liferaft shall be
provided by approved inherently buoyant material placed as near as
possible to the periphery of the liferaft. The buoyant material shall
be fire-retardant or be protected by a fire-retardant covering.
4.3.2.2 The floor of the liferaft shall prevent
the ingress of water and shall effectively support the occupants out
of the water and insulate them from cold.