A number of embodiments of personal watercraft having catalytic exhaust systems for treating and purifying the exhaust gases. Each license server compiles software license usage statistics and shares the usage statistics with the other license servers. A lateral drift region including n-type drift lanes and p-type drift lanes extends between the n and p wells. The switch determines which power source is used to heat the battery, and may be dictated by whether the battery heating system is plugged into the external power source andor a vehicle propulsion system is active, to cite several possibilities. The gate layer of the first MOS device, and the N-type diffusion layer of the second MOS device are connected, and the N-type diffusion layer of the first MOS device and the gate layer of the second MOS device are connected, and thereby a first capacitive element is composed.