@Dennis Doherty I suspect it might be connected to a 'wobbly' head position. i find if I keep my head fairly stable then the swim straight is accurate- even when I take a breath but if I wobble from side to side then swim straight gets a bit confused. I also re calibrate every time I swim?
I wonder how many T100 athletes will be running "naked" after the Dubai Debacle when they thought they were saving time and weight by not wearing watches and not having a way of measuring distance and laps and lost the race due to human error??
So you are saying failure to do the work raises the probability of injury therefore not making the startl ine in a fit shape or even simply not making the start line at all.