ACCESSORY GUIDE

Amateur radio, often called ham radio, is a hobby enjoyed by about 3 million people throughout the world. An amateur radio operator...                           continue

A marine VHF set is a combined transmitter and receiver and only operates on standard, international frequencies known as "channels" ...                 continue

TETRA  is a specialist Professional Mobile Radio and walkie talkie standard used by police, fire departments, ambulance and military...                         continue

The design of GPS is based partly on the similar ground-based radio navigation systems, such as LORAN developed in the early 1940s ...                continue