The ideal inertial sensor for navigation must, on the one hand, emit signals continuously at a high rate, and on the other, remain precise and sensitive over extended periods. Classic inertial sensors do meet the first criterion, but they err over time. Conversely, quantum sensors are extremely precise and sensitive, but measures are accompanied by dead time. By combining both sensor technologies, a team of scientists led by a CNRS researcher has developed the first multidimensional hybrid quantum inertial sensor. In an article published in Science Advances, they demonstrate that their device emits a steady signal at the rate of a classic sensor but with 50 times greater precision, using in situ, real-time calibration made possible by quantum measurements.