automobile navigation apparatus featuring GPS receivers, digital map displays and turn-by-turn instructions; electronic marine navigation products, namely, chart plotters and sonar depth sounders; GPS receivers; portable GPS devices, namely, electronic instruments for determining and outputting position and speed; marine electronic apparatus, namely, marine sonar fish finders; electronic chart plotters; wireless communications radios; wireless communications radios featuring a GPS receiver; personal digital assistants featuring a GPS receiver and electronic maps; satellite radio receivers; electronic navigation devices, namely, GPS receivers having an electronic compass; electronic navigation devices, namely, GPS receivers having an altimeter; electronic storage media, namely, CD-ROMs, DVDs, discs and cards containing map data; and navigation software for calculating and displaying routes; electronic exercise monitor, namely, an electronic tracking device; electronic exercise monitor featuring a GPS receiver, namely, an electronic tracking device