gyroscope which gyrospin axis can be made meridian-seeking (maintaining the spin axis parallel to the earth's spin axis) by the use of a pendulum acting under the influence of earth gravity, güroskoop, mille telge saab muuta meridiaani otsivaks (säilitades spin-telje paralleelselt maa spin-teljega) maa gravitatsiooni mõjul toimiva pendli abil