19. On every manned installation,
(a) every work area shall have at least two well-marked separate escape routes that are situated as far apart as is practicable;
(b) all escape routes shall lead to the open deck and from there to an evacuation station;
(c) in addition to the escape routes required by paragraph (a), clear passage shall be provided, where practicable, to the helicopter deck and sea level and other embarkation locations;
(d) all corridors that are more than 5 m long, all accommodation areas and, where practicable, all work areas shall have at least two exits, located as far apart as is practicable, that lead to escape routes;
(e) every escape route and embarkation station shall be free of all obstructions, and each exit door along the route shall be a sliding door or designed to open outwards;
(f) every escape route leading to an upper level shall, where practicable, be provided in the form of ramps or stairways;
(g) every escape route leading to a lower level shall, where practicable, be provided in the form of ramps, stairways or chutes of sufficient width to accommodate stretcher bearers with stretchers;
(h) suitable means shall be provided, where practicable, for persons to descend from the installation to the water;
(i) materials used for escape routes shall have a level of fire durability equivalent to steel;
(j) the survival craft evacuation stations located adjacent to the accommodation areas and the associated escape routes from the accommodation areas shall provide fire protection for a period of at least two hours; and
(k) all escape routes and associated stairwells shall be appropriately sheltered from the effects of fire and explosion.
Protection Against Impact
20. (1) Subject to subsection (4), every platform shall be designed to withstand accidental impacts with a vessel.
(2) Where practicable, every platform shall have a fender system, buoyage system or similar arrangement that will permit the transfer of goods to and from the production installation and a vessel without endangering that production installation or vessel or any person or goods.
(3) Subject to subsection (4), every platform, including any fender system, shall be capable of absorbing the impact energy of not less than 4 MJ from a vessel without endangering any person or the environment.
(4) Subsections (1) and (3) do not apply to an unmanned platform if any impact described by those subsections will not cause major damage.
(5) Every platform shall be designed so that the impact energy referred to in subsection (3)
(a) can be totally absorbed in the permanent deformation of the structural element impacted and by the elastic deflection of the platform; and
(b) will not be absorbed in the permanent deformation of the vessel.
(6) Where a fender system is used to comply with subsection (2), its size and arrangement shall be such that a vessel cannot be trapped under it at low tide.
21. Every installation shall be equipped with the navigation lights and sound signal systems that are required by
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