Profile: Marathon Technology Corp. specializes in repairing and sales of marine radio and navigation equipment. We also offer global positioning system devices. Our brands include Maracom™, Marine™ and Radio™. We provide Astro™ system which includes a bright color-screen handheld global positioning system device and a wireless transmitter, called the DC 20. To get started, take Astro™ outdoors & turn on the handheld & transmitter to acquire global positioning system satellite signals. Our GPS repair includes battery installation, case replacement, mounting brackets, keypad replacement, memory upgrades and keypad replacement.