hover

This one lets the rider ignore gravity, move in zero g and so on, but only on ground turfs or at most one z-level above them.

Procs
check_drifting	Makes sure the vehicle isn't drifting while it can be maneuvered.
check_grav	Makes sure that the vehicle is grav-less if capable of zero-g movement. Forced gravity will honestly screw this.
hover_check	Makes sure that the hoverboard can move in zero-g in (open) space but only there's a ground turf on the z-level below.

Proc Details

Makes sure the vehicle isn't drifting while it can be maneuvered.

Makes sure that the vehicle is grav-less if capable of zero-g movement. Forced gravity will honestly screw this.

Makes sure that the hoverboard can move in zero-g in (open) space but only there's a ground turf on the z-level below.