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Project 1910 Kashalot
Uniform class

These small titanium hulled, deep-diving nuclear-powered submarines were probably designed for covert underwater intelligence collection [ "research" or "ocean engineering"). Little is known about these deep-diving submarines. They are said to be very fast for their size, and fitted with side thrusters. The Project 1910 was the first Russian nuclear-propelled submarine using single hull construction.

In order to study new types of nuclear reactors in the early 70's, it was decided to build a nuclear submarine special-purpose Project 1910 (the code "Kasholot). The ship, devoid of the traditional torpedoes, was decided to be used as a means of delivery of military divers. "Nuclear deep-water station 1 rank (so classified nuclear submarine Project1910 in the Navy), AS-13 was laid down ["founded] in Leningrad (LAO) 20 October 1977, launched on 25 November 1982 and December 31, 1986 became a member of the North fleet. On February 23, 1983 the second ship of the same type - AS-15 - was laid down. It was launched on 29 April 1988 and came into operation on Dec. 30, 1991 In the West, NPS Project 1910 is known under the designation Uniform. The submarines are equipped with GEMs nominal capacity of 10 MW. With one reactor, there is one main and two auxiliary propellers.

They were referred to as "ocean engineering & research ships" by the USSR, code-speak for covert operations. According to some sources, they were designed to tamper with the USN's SOSUS network. The most distinguishing feature is "fenders" on the hull near the sail, for many years Jane's Fighting Ships reported that these were wheel-wells for driving on the seafloor, however in the 1990s similar shapes were seen on the undersides of "Alfa" class SSNs being scrapped. They are now assumed to be related to the reactor somehow, or, lateral thrusters of some type. The HF whip antenna is curiously mounted on the aft deck. Hull material is assumed to be titanium.

By 2008 the International Institute for Strategic Studies reported that of the eight remaining support submarines [SSAN], only three were active while the remainder were in reserve. It seems probable that the Uniform class are in reserve, and with the recent introductino of te Project 09786 ex-Kalmar and Project 210 Losharik boats, unlikely to return to service.

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