I've tried searching the forums for tips on how to properly use it, but i'm not quite sure i fully know how to use it correctly. I've just taken a 3 minute reading of a Japanese Merchant, and its done 0.4 miles in 3 minutes, so, how exactly do I use the nomograph to measure the speed??
I know its a case of drawing a line through the graph, but I think i'm doing it wrong.
Any help guys?
cheers