A system and method for effectively performing a white balance operation preferably includes an electronic camera device that captures image data using a image sensor device. A cooling apparatus of an internal combustion engine includes a cylinder block having a water jacket in which an insert is disposed; the cylinder block is machined so that a water hole or an aperture having a size corresponding to a size of the insert is formed in the cylinder block and the insert can be inserted into the water jacket through the water hole or the aperture. Thus, this system is useful in waters in which there is a constant ebb and flow of the tide and is especially useful in areas experiencing a storm surge. 5 ns; and an illuminating optical system for successively disposing the N third harmonics TRD1 to TRDN in parallel with each other, subjecting the N third harmonics TRD1 to TRDN to time multiplexing, and emitting the result.