Cheers Newt
If I remember right BRP inherited almost the same rule, but made it an elastic measure, letting the GM decide what that distance was on the ground depending on playing style and situation. Showing my ignorance, I had to look up what MRQ1 was , I've played it just didn't recognise it shortened.
Having played a lot of RPG's purley narratively and then in recent years playing in and running a few with mini's, I'm definatley an advocate of using miniatures. Everyone being able to see where various characters are, what cover is available, where they are going to be able to get to in a turn I find saves soo many questions and misunderstandings. Requires a touch more planning, but I' a glutton for punishment