Communication During The Rally. Permanent contact between pilots and the team is one of the necessary conditions of successful performance in a rally. Let's discuss the way the wireless contact during the race is provided.
After the car has left the service-zone communication with pilots is maintained with via mobiles and VHF broadcasting station (very-high frequency, frequency range from 30 to 300 MHz). As usual three-band mobiles are used - this ensures sufficient level of communication privacy between pilots and the team. But mobile connection not always can be successfully used - in some parts of the route receiving of the mobiles is very low. In such cases they have to use satellite communication. Team technicians and engineers have a special set as antinoise headphones with microphones. The same headphones are built into the pilots' helmets - this simplifies the communication. The equipment that is located in the service-zone allows in a short space of time to connect up to the conversation needed specialists and to establish conference communication.
Members of a team also communicate between each other via broadcasting stations, but in UHF range (ultra high frequency, frequency range from 300 to 3000 MHz). Usually they carry these stations on their belts and use sets. So the possibility to address to everybody at once via broadcasting stations facilitates the process a lot.

Wireless communication. Public information, for example information about the time or about the rally is transmitted via open channels. Ken Rees, Subaru team's coordinator (SWRT), is responsible for the communication between cars and the service-zone via radio channel. Racers contact with him to inform of their time or of any discovered defects. Each WRC team uses the same system, but on different frequencies fixed by FIA. Frequencies change, but this information is available for other teams because this is an open channel. Usually the long distance of such a communication is not more than several kilometers. But with the help of the repeater that is situated in a helicopter flying above the cars this distance increases in several times. The information up to 14 symbols from the computer to the display in a car besides the voice can be also transmitted via radio channel. In Subaru Impreza such a display is situated within navigator's eyeshot near his legs.
Thus the communication between Subaru Impreza WRC2006 and the team is provided with 7 various radio equipments:
- GPS receiver and inbuilt video camera;
- GPS antenna that transmits the information about a car's location to the organizer of the rally;
- Antenna that transmits the technical information about all car systems' work (this allows to SWRT engineers to carry out the analysis of the all main systems' work on-line); - GPS receiver (another one, to be on the safe side);
- Antenna, that transmits the technical information of all Impreza's systems;
- Antenna for the data transmitting;
- Antenna for the radio communication with the team.