The reason the movement system, and the grid system, was the way it was
was to preserve compatability with existing systems that they were supposed
to be interchangeable with, namely the "House System," AKA Twilight 2000. I
never really liked the 2-meter grid because of the violence that it did to
Traveller ship deckplans. It was impossible, in my opinion, to move
satisfactorily from 1.5 meter deckplans to 2 meter deckplans. However, in
the pressure of all of the good reasons and bad reasons--and the big deal
was that we told people that for all intents and purposes T2K and TNE
combat would be interchangeable-