Well, there are two different technologies used for the MWD system. One is mud pulse and the other is electromagnetic. The mud pulse has been around for a significantly longer period of time.
As a company, we have moved toward electromagnetic, sending it up as a radio wave rather than through the fluid system. That is essentially much more efficient in getting that information to surface. We're able to send probably ten times the data at ten times the data rate. As we start to bring more technology onto the tool, there's only so much data that we can send over a time period that provides the accuracy, so the technology that we have developed, the electromagnetic, is the most efficient method of bringing that information back to surface. That's one of the innovations we've been able to bring forward.