There's actually pretty good reasons for grav vehicles to fly NOE. First, being high up is a good way to make yourself into a target. Second, I've always imagined that the belly of a grav tank, however well armored, would be vulnerable to taking a grav generator or propulsion system hit, much as the treads of a tank are vulnerable today. Damage one of those systems and what you have is a heavy piece of machinery that either can't maneuver or can't "float" and it's going to have to sit down some place in cover while the issue is corrected.
Indeed I envision anti-grav tank mines being something that sits at ground level, waiting for a target vehicle to fly over, at which point it pops straight up at an interception point and *whack!*. Evading them would involve flying very, very low and very, very fast or deploying infantry out ahead to make sure there's nothing nasty hiding over the next ridge.
Indeed I envision anti-grav tank mines being something that sits at ground level, waiting for a target vehicle to fly over, at which point it pops straight up at an interception point and *whack!*. Evading them would involve flying very, very low and very, very fast or deploying infantry out ahead to make sure there's nothing nasty hiding over the next ridge.