portable electronic marine apparatus used for navigation and used for fishing to detect fish using sonar; marine depth finders; sonar fish detection indicators in the form of floats; sonar fish finders; sonar transducers; electronic fish detectors; sonar transmitters, sonar receivers, visual display instrumentation and sonar control instrumentation, namely, a portable sonar control system comprised of a receiver and transmitter that connects wirelessly to smartphones, tablets and other portable computing devices to provide the user with information about the water bottom, water temperature, fish locations and overall marine conditions; computer and mobile device programs and applications for use in underwater imaging, navigation, and the detection of fish, namely, computer programs for sonar signal processing, for image processing, for graphical user interfaces, for video display networking, for GPS processing, and for operation of a marine sonar system; accessories for mobile communications devices, namely, mobile phone cases, waterproof cases, car, boat, and wall chargers for sonar systems; life jackets; weighing scales for fish