- Spy ship
A spy ship is a dedicated
shipintended to gather intelligence, usually by means of sophisticated electronic eavesdropping gear. In a wider sense, any ship intended to clandestinely gather information could be considered a spy ship.
Spy ships are usually controlled by a nation's
government, due to the high costs and advanced equipment required. They tend to be parts of the nation's navy, though they may also be operated by secret services and masquerade as civilian ships such as fishing trawlers, which could be reasonably expected to remain in a certain area for a long time.
Ships which are used to infiltrate spies or
special forcesare sometimes also called 'spy ships'. [" [http://query.nytimes.com/gst/fullpage.html?res=9807E5DC1331F931A2575AC0A9649C8B63&sec=&spon=&partner=permalink&exprod=permalink Suspected Spy Ship Salvaged] " - " New York Times", Thursday 12 September 2002]
Spy ships in the modern sense have been used at least since the early
Cold War, and are in use by all major powers. Their uses, in addition to listening in on communications and spy on enemy fleet movements, were to monitor nuclear tests and missilelaunches (especially of potential ICBMs).
One of the most important functions for both Cold War spy ship fleets, especially in the 1960s, was the gathering of
submarine'signatures' - the patterns of noise that could often identify the specific type of submarine and were thus valuable in anti-submarine warfare. During that era, the USA fielded about 80 vessels, usually classified as 'environmental research' craft, while the Soviets had around 60 ships, often converted trawlers or hydrographic research ships." [http://www.time.com/time/magazine/article/0,9171,837783,00.html The Ferret Fleets] " - "Time", Friday 02 February 1968]
In the late 1980s, the Soviet fisheries fleet was known for having equipped many of their thousands of ships with sophisticated
SIGINTand ELINTequipment, thus functioning as auxiliary spy ships tracking western naval vessels and electronic communications (though their main function remained commercial fishing). [" [http://www.heritage.org/Research/RussiaandEurasia/asb80.cfm Moscow's South Pacific Fishing Fleet Is Much More Than It Seems] " - Kim, Byung Ki; The Heritage Foundation, "Asian Studies Backgrounder" No. 80 September 6, 1988.]
A spy ship usually stays in
international waters[" [http://www.taipeitimes.com/News/taiwan/archives/2003/08/16/2003063942 Legislative group says fishermen are spying for Beijing] " - " Taipei Times", Saturday 16 August 2003, Page 3] [" [http://query.nytimes.com/gst/fullpage.html?res=950CE6DA1338F930A25755C0A967948260&sec=&spon=&partner=permalink&exprod=permalink Spy Ship Off L.I. Awaits Trident Sub] " - New York Times", Saturday 13 June 1981] (or at least outside of territorial waters), so as to not violate territorial borders. From there, it will use its electronic gear to monitor sea and air traffic, radio and radar frequencies and also try to intercept and decryptcoded radioor phonecommunications. This is mostly done via passive means such as radioreceivers or passive sonar. Sometimes however, active measures such as radaror sonarmay also be used to detect the movement of aircraft, missiles, ships or other vehicles or troops. [" [http://query.nytimes.com/gst/fullpage.html?res=9E01E6D91338F937A25755C0A967948260&sec=&spon=&partner=permalink&exprod=permalink Soviet Spy Ship Waiting To Observe Trident Test] " - " New York Times", Sunday 14 June 1981] [" [http://news.bbc.co.uk/1/hi/world/europe/310928.stm Don't arm Serbs, US warns] " - BBC, Saturday 03 April 1999] However, this risks revealing the ship's purpose.
As it is located much closer to the surveilled area than a fixed installation (given a close-by
shoreline), the monitoring is usually much more efficient and in some respects better than even that of spy satellites.
Tracking vessels for space missions / control stations for
satellites/ spy satellites also have some of the capabilities of spy ships, and as they are controlled by their national governments, it can be considered reasonable that they are intermittently used for similar purposes, such as tracking enemy missile tests.
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