Sonar depth finders and fish finders; radar apparatus; radios and transceivers; chart plotters; downloadable electronic maps and charts; pre-recorded electronic media featuring maps and charts; echo graphs and other technical devices and apparatus for fishing and navigation; global positioning system (GPS); GPS navigation device; ultrasonic marine depth sounders, two-way radio apparatus, navigation apparatus for boats, autopilots in the nature of electronic automatic controls for adjusting, steering, and keeping course; compasses; marine navigation software; apparatus for recording, transmission or reproduction of sound or images; data processing equipment and computers; electrical transducers; sensors for determining temperatures, speeds, positions and distances; mounting hardware for monitors, batteries and battery chargers; electrical switches, electric cables, wires, conductors and connection fittings therefor; protective covers and cases for the aforesaid goods