18th October 2012, 08:43 PM
Not sure why, but gravel-filled features seem to show best in low diffuse light when slightly damp (ie very light dew, not rain) - sorry, I'm sad enough to like turning up on site an hour before the minions roll up, so this probably isn't a good technique for the ever-multiplying clock-watchers. Think I've mentioned somehwhere on here before that shorter wider trenches tend to find more features per square metre than long thin ones, the bog-standard bucket-width/2m wide machine trenches are rubbish, 3m minimum, 5 is better -and a good test for the machine driver :face-stir: