September 2019

How do we measure depth with sound?  The basic analogy is shouting from a mountain top and listening for your echo.  We shout into the ground and listen for our echo.  We do more than just listen, because we use a stopwatch to time how...

In a recent conversation with a client, they mentioned that they are regularly called out on an “undetectable” locator ticket.  What is this "undetectable" stuff?  To them  “undetectable” means something like “unable to locate the structure using standard electromagnetic devices”. In many of these cases...