I. Introduction
In accordance with the modern scientific terminology [1] the initially stabilized platform (ISP) represents a platform equipped with the system of control by the spatial inertial orientation mounted at it payload. Usually the direction-finding (viewfinders, antennas, telescopes) and navigation (angle and rate gyro sensors, accelerometers, magnetometers) units and devices are considered as payloads of ISP. Application of the ISP allows solving such tasks as:
stabilization of the payload during angular motion of the object, on which it is mounted,
pointing at the unit line-of-sight to the given reference point;
the line-of-sight tracking in direction of the moving reference point.