Automatic zero calibration with ambient air on every start of the system, opticalandacoustical signal after finishing of calibration.
开启系统时,仪器会自动进行零校准。校准完毕后会出现光学和声学信号。
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Equipped with electronic intelligence (ELINT), bow-mounted sonar, opticalandacoustical surveillance systems, the ship was designed to collect foreign ship intelligence in offshore waters.
The specialty pigment in the CarSecure stickers can be checked using a special hand-held spectroscope, which employs opticalandacoustical signals to indicate whether the sticker is genuine.