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The mechanical systems of submarine periscopes typically use hydraulics and need to be quite sturdy to withstand the drag through water. The periscope chassis may also support a radio or radar antenna. Submarines traditionally had two periscopes; a navigation or observation periscope and a targeting, or commander's, periscope.
Submarine: A Guided Tour Inside a Nuclear Warship (Revised ed.). Berkley Books. ISBN 978-0-425-18300-7. Craven, John Piña (2001). The Silent War: The Cold War Battle Beneath the Sea. New York, New York: Simon & Schuster. ISBN 978-0-684-87213-1. DiMercurio, Michael; Michael Benson (23 December 2002). Complete Idiot's Guide to Submarines ...
Communication with submarines is a field within military communications that presents technical challenges and requires specialized technology. Because radio waves do not travel well through good electrical conductors like salt water, submerged submarines are cut off from radio communication with their command authorities at ordinary radio frequencies.
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Sail of the French nuclear submarine Casabianca showing the diving planes, camouflaged masts, periscope, electronic warfare masts, door and windows.. In naval parlance, the sail (American usage) or fin (British/Commonwealth usage) (also known as a fairwater) of a submarine is the tower-like structure found on the dorsal (topside) surface of submarines.
The US Navy's Virginia-class submarine program is projected to run $17 billion over budget through 2030. The Navy is expected to build two Virginia subs a year and faces a time crunch with ...
CurrentTime TV is a joint effort by VOA and Radio Free Europe/Radio Liberty to produce a 24/7 TV service in Russian. Alhurra is an Arabic-language state-funded satellite TV news channel. TV Martí is another American governmental TV service, broadcasting for Cuba in Spanish. Bloomberg Television is a
Virtual periscope is a system that allows submerged submarines to observe the surface above them without having to come to a shallower depth, as is required by traditional periscopes. The system, described in a patent as "Virtual Periscope", [1] was tested in 2005 aboard USS Chicago (SSN-721). It employed a small camera mounted on the sail of ...