The 2 pilots of ZD576 had not done the planning for the sortie - but they obviously did not check the Lat/Long postions entered into the Nav System. That alone warrents the finding of "Gross Negligence".
Cazatou, What happened to the "no breakfast and therefore negligent" argument? You are clutching at yet another straw or are presumably once more blinkered by a lack of experience and understanding of the role.
Why is it obvious?
In any event, this was a VFR flight and therefore the nav system wasn't actually required. I flew RAF helicopters and fixed wing aircraft without a nav system of any sort fitted, instructed on them, too. Sometimes we flew through five or six thousand feet of solid cloud to VMC on top to instruct or transit. Does that make me grossly negligent? If so, it was widespread and mandated by the RAF because that was the job.