The present invention provides pressure-sensitive adhesives having a refractive index of at least 1. Various plate geometries are disclosed including ones with flat outer faces and ones with convex outer faces to conform to the adjacent vertebral mating surface geometry. The mobile units and dispatch agencies have forms of identifications to route messages between the mobile units and dispatch agencies according to the forms of identification. An exhaust gas condenser may advantageously be placed into the bottoming cycle system.