An infrared remote control receiver 20a includes a carrier detection circuit 12a. The apparatus provides points of attachment for a tether line to which a safety harness worn by a workman on a sloped roof can be attached. The user is able to interact with the graphical representations to see the impact of the user’s choices on the user’s future health. The fuzzy logic controller executes fuzzy logic algorithms for assessing the emergency situation and controlling the aircraft thrust vectoring and aerodynamic flight control systems in the emergency situation. In accordance with the present invention, the planar cleaning sheet may be either a woven fabric or nonwoven fabric, such as a carded web, spunbond, meltblown, air laid, wet laid, or a combination thereof.