A high pressure transducer has a metal housing with a main inlet high pressure port at one end and a reference pressure port at the other end. The photocatalyst comprises particles of photocatalytically-active oxide having a surface area of greater than about 190 m2cm3 of skeletal volume and having pores with a diameter of about 4 nm or greater. The external memory medium stores update information associated with the program instructions and relevancy information indicative of a characteristic of the update information. The power module comprises a housing, which defines an interior space that is adapted to hold either the female connector or male connector of a power cord. The signal generation system also staggers the navigation data in each sub-frame into a first portion and a second portion for parallelly transmitting the navigation data over a first carrier frequency and a second carrier frequency in reduced time.