This simple periscope uses only flat mirrors as compared to the periscopes used on submarines, which are usually a complex optical system using both lenses. In a submarine periscope, prisms are used in place of mirrors at the top and bottom of the periscope tube, aligned parallel to each other. British submarine technology is cutting-edge, but for a century they have relied on one piece of technology to see above the waters surface. A submarine is routinely required to return to periscope depth however,. A submarine sounds and control room simulator was used to. Periscope, optical instrument used in land and sea warfare, submarine. Frequently there is a telescopic optical system that provides magnification, gives as.
Do you think taking a periscope to a concert would be a good idea? Periscopes started being used in submarines from around 1860. But operating at periscope depth, just beneath the surface, submarines are relatively easy to detect. To prevent detection, periscopes are used as infrequently. Requirements for submarine periscope depth operations have been increased by. Sliding mode control and several schemes of state feedback are used for. Submarines have only periscopes for outside vision, and those are only used close to the surface, a periscope depth (pd). .