Al,  do you know much about this type of survey? Apparently this is a much more expensive type of survey so I am assuming that it has something to do with the depth penetration. The press release states that Insight penetrates up to 400m - how deep does a typical survey reach? 

It also leads me to wonder why Probe decided to use a more expensive survey - is it because of their confidence of the MMI results or were conventional surveys not available because of all of the activity in McFaulds?