A turbofan engine works by using a combination of a gas turbine engine and a ducted fan. The engine ingests air through an inlet, and a portion of the air is compressed and mixed with fuel, which then combusts in the combustion chamber. The hot gases produced are expelled through the turbine section, generating thrust. The remaining bypassed air is accelerated through the ducted fan, which also contributes to the thrust generated by the engine. This process provides a balance between thrust and fuel consumption, allowing the Kh-555 to travel long distances while maintaining its subsonic speed.

In addition to the INS, the Kh-555 also employs satellite-based navigation systems, such as the Russian GLONASS or the American GPS. These systems provide continuous updates on the missile's position and help to further refine its course, ensuring even greater accuracy during the flight.

The missile has a range of approximately 3,000 km (1,864 miles), enabling it to strike targets deep within enemy territory. Its long range is one of the critical features that make it suitable for use in strategic operations. The Kh-555 is launched from strategic bombers such as the Tupolev Tu-95MS and Tu-160, which further enhances its operational reach.

In terms of altitude, the Kh-555 is designed to fly at low altitudes during most of its flight, typically around 30-50 meters (100-165 feet) above the ground. This low-altitude flight profile helps the missile evade enemy radar detection and air defenses by utilizing the terrain as cover. The missile's terrain contour matching (TERCOM) guidance system plays a crucial role in maintaining this low altitude while navigating accurately.

During the final stages of its flight, the missile may descend to even lower altitudes to minimize the chances of detection before reaching its target. The terminal guidance system enables the Kh-555 to home in on its target with pinpoint precision, ensuring high effectiveness in combat.