Abstract: The velocity detecting system includes an emitter, a receiver, a light path, a measuring system, and a deducer to calculate the velocity of a body without relying on an external body with independent motion or an earlier known body velocity. The emitter radiates light photons which follow a known light path until the photons reach the receiver. The light is measured by a measuring system. Using the measurements, the light path, and the constant speed of light (c), the deducer calculates the velocity of the body in the direction of the light path.

Abstract: A user controller for a tourist vehicle's audio system that is linked to a control box. GPS technology is used to track the global location of the vehicle and thereby of the user controller. The user controller includes a housing having a contoured contact surface with one or more recessed tactile controls and a display screen. Backlit graphic indicia and Braille characters are provided adjacent the tactile controls to let a user know what function each tactile control actuates. Capacitance sensors are located below a contact surface of each tactile control. Adjacent tactile controls are separated by raised regions, the height and width of which are different based on whether the tactile controls on either side of the raised region are directed to related functions or not. Pre-recorded messages, including local advertising related to the global position of the vehicle are played when the user controller is activated.