Which MFD do you have? I have the 9" touch screen non chirp. My tournament partner is a raymarine sponsored pro. We seem to use the non chirp when we're running and use chirp when at trolling speeds because the marks are incredible. Here's what I'm doing this winter, I'm gonna add another touch screen chirp and link the 2 together. That way I have the best of both worlds. If you don't buy another unit, you can buy there black box to add chirp. Pretty sure anyways. Aaron