We live on the water in South Florida and go diving at least a few times a week. We all have Navionics on our phones and use that to find our dive spot, while turning our glance back to the depthfinder all the time. However, this weekend we used our new T-box vexilar unit which transmits a live sonar feed to our phones, iPads and tablets. We could watch the bottom contour at the same time we were watching the chart. Sooo much easier to make sure we were on the mark before dropping. Soooo cool!