High resolution echoes from shallow to deep waters / High precision fish size graph for efficient and sustainable fishing. FCV-1900B Hi-Res TruEcho CHIRP Fish Finder allows you to see echoes that would otherwise not have been visible. FCV-1900G features a unique fish size indicator that utilizes TruEcho CHIRPTM technology for precise estimations of fish size and size distribution in schools of fish. You can accurately analyze schools of fish all the way from shallow to deep waters. Experience incredibly accurate echoes, even in deep waters thanks to our TruEcho CHIRPTM technology. The FCV-1900G is well suited for trawlers where accurate and reliable information about the sea bottom is necessary. Utilizing the fish size graph, choosing the right target is simple, allowing you to maximize your time at sea, while avoiding unnecessary bycatches.