1. A sonar system, comprising: (a) at least one sonar data acquisition device; (b) at least one user interface allowing an operator to select a desired target for tracking; and (c) at least one processing system electronically and removably connected to the at least one sonar data acquisition device and the at least one user interface; wherein the sonar data acquisition device provides acoustic data and orientation and/or positioning feedback based on the position of the sonar acquisition device to the processing system, and the processing system acquires the desired target for tracking from the user interface and maintains the at least one imaging sonar data acquisition device aimed and pointed at the desired target independent of the position and orientation of the vessel on which the sonar system is mountable.