QUOTE (Prime Mover @ Jul 23 2009, 06:05 PM)

Looking at change document and that change isn't listed as optional. ( I understand my call. )
I'm staring at the SR4A pdf and it's the GM's decision on whether or not to impose that limitation.0
QUOTE
It was my under standing if you didn't achieve enough successes in the first 10 minute interval you started out form scratch in the next 10.
If it was the case were we could keep our success through multiple intervals there never really would be a failure just time elapsed. (Barring the rare glitches.)
This is to a degree the entire point of extended tests - you're going to succeed, it's only a matter of time, so your major limiting factor is how much time you want (or can) to spend on those tests. Certain extended tests are of the nature of diminishing returns, hence why the GM can impose the -1 modifier.
Anyway, a watcher is a nearly mindless servitor - the simple and single-minded task of looking for something is well within its job description.