For many golfers, estimating the distance to a particular advantageous position on a long hole is a serious problem that stands in the way of hitting a good round - especially at an unfamiliar golf course.

Indeed, few things are more infuriating than seeing your perfect tee-off sail past that perfect spot to land in the rough, a bunker or water...

What if you had a handy little tool - the size of a credit card - that could accurately calculate any desired distance on any course for you?

Would it help you gain the few points that sit between an okay score and a memorable round?