In one exemplary embodiment, a gas turbine engine includes a turbine and a high pressure compressor. The device has a manipulating device also arranged inside the housing, for manipulating the reticles in the housing. An optical axis deflector is provided for deflecting the optical axis to switch the measurement position between a first measurement position and a second measurement position, so that first and second distance measurement signals corresponding to the first and second measurement positions are output from the optical distance measurement unit. This \u201cJust-in-Time strategy can be initiated automatically without operator input to accommodate the unsophisticated operator and without needing a navigation systemGPS input. The selected content is distributed to the one or more cooperating mediasubstrates.