Il faut aussi que le modèle soit pourvu d'instruments afin que ses mouvements (roulis, levée et tangage) et son attitude (gîte, enfoncement et assiette) soient surveillés et consignés.
It is also required that the model is instrumented so that its motions (roll, heave and pitch) as well as its attitude (heel, sinkage and trim) are monitored and recorded through-out the test.
