Contractor in Holland tried them all, no other walk over locator could do the job, Mag 8 breezed through. Contractor was not allowed in the canal. They didn’t want to spend the money for a wireline tool and tried the other two walk over systems but lost signal soon after drilling under the canal. They heard about the Underground Magnetics system and asked if we would give it a try. The job was time sensitive so before trying the UMag system, they had a wireline company out to quote the bore; literally standing watching us drill. We had signal the entire length of the canal with our least powerful transmitter.