A null-grav haulage ray was a form of technology utilised by the Brigade of Gübernators. It was functionally almost identical to a tractor beam, although the Fourteenth Doctor could tell the difference.
The Brigade of Gübernators' spaceship utilised this ray to capture their victims, including the Red Baron's plane and the Doctor's TARDIS. The Doctor, however, was able to break its anti-gravitational hold over them with relative ease by using his sonic screwdriver on its control orb. (COMIC: Untitled [+]Loading...["Untitled (DWM 598 comic story)"])