Power regulator circuitry that can provide a regulated power signal. The WLS then produces the first location estimate and provides it to a first location application, and then produces the second location estimate. All components of the transceiver\u2014except outer portions of inputoutput leads and a suction cup for attaching to the transceiver to a diver’s mask\u2014are completely encased in transparent plastic. The fuel control module selectively increases an amount of fuel provided to the engine based on the temperature of the intake valve, the engine torque, and the fuel volatility.