The S7 mat covered an area of ground about the size of the phone you’re reading this on, hence the yellow target on the mat was a fortuitous addition. When you stared down between your shaking legs you at least had something to aim for, no matter how statistically slim your odds of hitting it were. You were aiming for the bull but considered yourself a winner if the dart even stuck in that sort of cabinet thing with the doors that you hang a dartboard in. Bounce-outs were common. The set of on-the-fly calculations and seat-of-pants dead reckoning required to land was on a par with the successful return of Apollo 13. Nevertheless, it totally changed the world for us, as it was already starting to change climbing over the next decade.