Currently world tendencies of inertial navigation systems (INS) development show to almost full transition to method of strapdown systems (SINS). Transition to SINS technology is defined by the fact that such systems are in 3 ÷ 4 times more informa-tive in comparison with platform ones, providing ~ 50 % MA mission reliability in-crease; complete autonomous initial alignment in 1,5 ÷ 3 less time, thus substantially reducing MA vulnerability; have their mass-and-dimensional parameters reduced in 2 ÷ 3 times; is in ~ 10 times less power consuming and has more than in 10 times larger operational life, which reduces system life cycle cost.

The Moscow Institute of Electromechanics and Automatics has started development of inertial navigation systems, mainly air application, since 60s of the last century. By the end of the 90s the Institute has developed and delivered in operation some modifications of gyro INS on floating astatic gyros that are still in operation at pre-sent. During the same time the Institute has developed the SINS domestic technology which, in particular, included technologies of the laser gyroscope, the quartz acceler-ometer, the high-efficiency but a little power-intensive airborne computer, and the precision high-speed analog-digital converter. Last decade activities in the indicated area are characterized by developing for MA SINS of two accuracy classes: BINS-SP-1 with the dead reckoning error equal 3,7 km. per hour (3rd accuracy class) and BINS-SP-2 with the error equal 1,85 km. per hour (2nd accuracy class). The first sys-tem has passed all kinds of tests and accepted to series delivery. The second system is at the final stage of flight tests now. These systems are used on board of Yak-130, Tu-160, AN-70, SU-35 and other aircraft. The article discloses systems structure, software differences, main specifications (Fig. 7) and provides the flight tests results (Fig. 8-10), confirming specified requirements. By their specifications these systems are in parity with the foreign systems of similar functionality (the Table).Thus, it is possible to note that in Russia has produced the SINS domestic technology which is highly competitive with known foreign analogs.