Which statement about the INS is false?

• A. It is self-contained
• B. It can be jammed
• C. It is non-radiating
• D. It requires no ground-based or airborne support

Answer: (B)

An inertial navigation system operates purely from internal sensors—gyroscopes and accelerometers—so it calculates motion, position, and attitude without relying on external signals. Because it does not emit radio waves or rely on ground-based or airborne navigation aids, it is self-contained and non-radiating, and it can run without any outside support. The trade-off is that small sensor biases and misalignments cause drift over time, so accuracy degrades unless updated or re-aligned periodically. Since there are no signals to intercept or jam, there’s nothing an external jammer can disrupt in the INS itself. Therefore, saying it can be jammed is false.