How accurate are we?

[Bier Keller]

In my opinion, so long as you have maybe a couple of solid OS co-ords from CAD then tapes are fine. Yes, on windy days tapes are real pain the C?lus and sure they can stretch, but within the constraints that are encountered on WB's, I think they are perfectly adequate. If archaeology of sufficient quantity and "quality" are discovered then surely another form of mitigation is required, even if this just means a few more hours and maybe a bit less pressure from the client - then yep, go for the TST option. But for common-or-graden jobs, just stick with tapes. In any event, how many different jobs do units run at the same time? Do they generally have a TST for each of the half a dozen they have on the go? I have only limited experience of GPS on site and found them to be only good to within a few metres (maybe this was just a cheapy version?) and was more confident using tapes and OS co-ords - although trying to tie in OS co-ords when one is on a windswept WB on Haltwhistle common (for example) would be difficult. I can see GPS being useful then. Just my opinion. Perhaps in 100 years time archaeologists will loo at us and say "Fools! What were they thinking?"

Beer is your friend