[Alun]

we have a type of roman numeral marking system for our rope which makes mistakes pretty much impossible. one blue stripe is 10m, one black is 50m. one black and three blue is 80m. etc yellows mark the 5's inbetween and white markings for every metre.

i quite fancy trying no-suit diving again sometime, but we don't have a boat and i would need to swim out 100m to the deep area, so it might be difficult right now.