Gary Burrell, who with a fellow engineer founded Garmin, the navigational device company whose products can direct pilots in fog, prevent hikers from getting lost and help insomniacs track their sleep, died on June 12 at his home in Spring Hill, Kan. He was 81.

His death was announced by the company, which is based in Olathe, Kan. The cause was complications of Parkinson’s disease.

Mr. Burrell (pronounced burr-ELL) was vice president of engineering for King Radio, an avionics company that made navigational devices, when he recruited Dr. Min H. Kao from Magnavox, another defense contractor. Dr. Kao had been instrumental in developing a GPS receiver for aircraft.

At the time, the government was opening up its Global Positioning System for civilian use, and the two men saw possibilities.