A passive fire protection system for the protection of vertical walls against flames and heat in a severe total environment type fire, the system including a multi-layered, flexible material containing at least one layer of intumescent material. In an exemplary embodiment, a universal wireless access gateway may include a shared component and a first environment access module that communicates with the shared component to enable access to a first network using a first wireless access technology. Each of the distribution ducts includes a distribution valve to vary the flow through the respective distribution duct and through a dump duct that exhausts air outside of the passenger compartment. The ski also includes an undersurface with a substantial portion being rockered. The coolant isolation manifold includes a fluid dielectric coolant that comprises a kerosenic hydrocarbon, which can be kerosene or an emulsion of water in kerosene. A component of a hydraulic system is also disclosed.