Gravimetric interference
Gravimetric interferences were phenomena in space that could make plotting a course rather difficult. 

Navigating through a globular cluster like the Amargosa Diaspora can be complicated by gravimetric interferences. When the  was examining the Amargosa Diaspora in 2369, Commander William T. Riker assisted Ensign Sariel Rager in plotting a course through the clusters and showed her how to compensate for gravimetric interference. ()

de:Gravimetrische Interferenz
Physics