A mobile rig (or automobile rig) is a class of communications system that is midway between a base station (building-mounted) and portable (body mounted). Such a device is typically run off a 12 volt vehicular electrical system. Wireless communities have existed since the days of amateur packet radio (ham radio), in three well-defined categories:

• Fixed: (also known as base stations): fixed devices on or in buildings, homes, offices, or other ``fixtures'' such as a ham shack, post, outpost, or attached to a tree, or other fixture;
• Mobile: Vehicular or ship-based systems, wireless systems in trucks, vans, cars, boats, or motorcycles. A wireless station on a bicycle such as N4RVE's behemoth would also be categorized as Mobile. People who use mobile communications devices are often called mobileers;
• Portable: Systems worn or carried upon the human body. An implantable system such as a wireless communicator injected beneath the skin would also fit this category.

Chronologically, these happened in the order presented: first there were the fixed ham shacks, then the mobileers, and finally the body-borne technologies (portable and wearable, implantables, etc.). These three categories are well established, and well known in the amateur radio digital wireless communities. Of particular interest are the latter two categories (Mobile and Portable) because they have been made possible by miniaturization of components. Motorola was one of the early makers of mobile rigs. The name Motorola derives from motor (i.e. motor vehicle) and ola (meaning sound, audio). Motorola has made a large number of vehicular two way radios for police, taxi, and similar usages.

A car phone is a telephone "mobile rig" made for use in a vehicle.

External links

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• Mobileering Information Page
• KA6WKE's HF Mobile Web Pages
• HF Mobile Rig - FT-100
• Motorola history
• A typical installation guide for a mobile radio/telephone (General Motors Corporation)

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Amateur radio | Wireless communications