Methods and systems for managing multiple inputs that are capable of competing or contending for a particular or primary output are described. Pressure communicates with a diaphragm which defines one side of the closed chamber and the pressure communicates via the oil with a pressure sensor which is mounted within the oil spaced from the diaphragm. The exhaust gas treatment module may be advantageously mounted on the base engine, and disposed between an exhaust aftertreatment system having an outlet to atmosphere, and the turbine outlet. In a pillow top mattress, the pillow top and the gusset between the mattress and the pillow top are formed in a like manner. Finally, the electronic digital signal, i. A proximity sensor can be included which warns of any obstructions around the perimeter of the watercraft carrier via a secondary audible alarm.