Deeper Smart Sonar PRO is using Wi-Fi connection to secure the enlarged distance between the Deeper device and the device user. It is designed to float on the water surface and scan the entire bottom and water column – measure depth, temperature, bottom structure, mark fish – then stream all information instantaneously to your smartphone or tablet. Deeper Smart Sonar PRO is a versatile castable sonar perfect for shore, kayak and ice fishing. Boat Mode. When operating Boat Mode you can mark the real time bathymetric data on top of your archived offline map and display directly on your smartphone screen. This feature uses your smartphone GPS to set your precise location. All maps can be archived and accessed at any time to improve your fishing efficiency.