GPS Rally Computer
GPS Rally Computer is a Universal app designed to simplify computations necessary to navigate a traditional time-speed-distance (TSD) automobile rally. The design and implementation is based on specifications outlined by Clarence Westburg and Rich Bireta, commonly know as the Simple Rally Computer or by its acronym SRC.
A TSD rally is comprised of stages set along a route defined by written instructions. The first stage is the Odometer Check stage that allows you to calibrate your car’s odometer with that of the Rally Master’s odometer.
In later stages you will follow a course at a particular average speed that will change from time to time at places that are generally unknown in advance.
In order to drive the course at the prescribed speeds. Odometer measurement is obtained from Apple’s GPS receiver or third-party devices via Bluetooth.
The GPS Rally Computer allows you to do all this and much, much more. For more documentation, download the User's Guide.
Features of the GPS Rally Computer:
Note: Use of the GPS Rally Computer during any particular rally will be subject to the rules and instructions governing the rally and will likely define your category or class among participants. Some rallies may, in fact, prohibit use of this app. Also, some rallies may have classes strictly for those with Simple Rally Computer (SRC) apps.
For better GPS reception and improved accuracy while rallying, third-party wireless GPS receivers are recommended. This app has been tested with Bluetooth connectivity to a Dual XGPS150A Universal GPS Receiver.
Disclaimer: Continued use of GPS running in the background can dramatically decrease battery life.
revised: March 22, 2017