Both the FarSounder-500 and the FarSounder-1000 have been designed to detect targets that are navigation obstacles for vessels from 60 feet (20 meters) and 650 feet (200 meters). In general, if a vessel cares about hitting the object, we can detect it. If the vessel does not care about hitting the object, we do not detect it well. For example, we can see navigation buoys but we cannot see most fish well (although the fish may care about being hit by a 100m vessel, the 100m vessel usually does not care).
Of course, FarSounder's core technology is very flexible and easily configurable. We can easily design a custom system to detect objects of almost any size depending upon the needs.