Tonight we ran into this situation
Mon Karren suffered the crit
Thruster Fissure - Ship - when you change your speed by one or more, suffer one damage
I was constantly using tractor beams and Konstantine to modify his ships seed. Our table side ruling was that due to the effects of konstantine and tractor beams acting as speed modifications to the speed dial of the ship it did in fact trigger the effects of thruster fissure because I was forcing my opponent to change his speed. Therefor each turn I was able to force two hull damage by upping his speed with konstantine (1 damage) and then reducing it with tractor beams (1 damage).
I think this might be a rules question worthy inquiry. Thoughts?