Summary: The computational model of additional errors, which occur from interaction of intense shock N-wave with inertial positioning devices of hypersonic aircraft was built. Angles of coincidence for the industrial design of the angular velocity sensor were fitted. A comparative analysis of the experimental data for seminatural conditions for the two cases (gyroscope ON, gyroscope OFF) was made. Conclusions about the possibility of use of the results were made.

Key words: N-wave, hypersonic aircraft, caustic zone, wave coincidence, float gyroscope.

Summary:  The analysis of the results of the static tests of the copper ring is immersed in liquid and exposed to the influence of external sound radiation. Reveals the nature of formation in the liquid the concentration of sound waves in a surface caustics. Explains the causes of the concentration of sound waves and the emergence of global and local moving fluid flows. Analyzes the energy status of the liquid inside the limited ring space with different directions of action of the sound beam with flat front.

Keywords: caustic, aberela, wave size, the concentration of the sound waves driving the flow, diffraction.