The Russian Hydrographic Service, officially the Department of Navigation and Oceanography of the Ministry of Defence of the Russian Federation, is the hydrographic office of Russia responsible to for
The Osinovetsky Lighthouse near the Neva entrance is one of the tallest lighthouses in the world.
Lightship Nekmangrund (1898) off Hiiumaa
A spy ship or reconnaissance vessel is a dedicated ship intended to gather intelligence, usually by means of sophisticated electronic eavesdropping. In a wider sense, any ship intended to gather infor
USS Liberty, a "technical research ship", in 1967
Oker, an Oste-class ELINT and reconnaissance ship, of the German Navy
SSV-33 Ural, the largest spy ship ever constructed, used by the USSR to observe and track US ballistic and orbital launches.
While USNS Vanguard was not strictly a spy ship, being used for space tracking, there is some overlap between her capabilities and those of a spy ship.