Navigation system with pivoting inertial measurement units

An inertial navigation system intended to be carried on board a vehicle, comprising at least two first inertial measurement cores of the type connected to the vehicle and at least two second inertial measurement cores each secured to a turntable mounted to pivot about an axis of rotation, the axes of rotation of the second inertial measurement cores being angularly offset to one another, the system comprising an electronic location calculation unit, which is connected to the inertial measurement cores and to a motor that drives the rotation of the turntables to control them and which implements at least one filtering algorithm to observe and correct a discrepancy between the positions provided by the measurement cores, the electronic unit being programmed to control the motor in such a way as to cause the turntables to pivot and process the measurements simultaneously coming from the second inertial measurement cores in at least two distinct angular positions of each turntable and of the first measurement cores.