Raven Viper Pro owners who want to add GPS automatic steering now can upgrade their system to AutoFarm FarmPro differential GPS (DGPS) or real-time kinematic (RTK) steering with an upgrade kit. The FarmPro DGPS kit allows hands-free steering using WAAS or OmniStar XP or HP correction. Upgrading to FarmPro RTK allows sub-inch-accurate vehicle placement.

Upgrade kits include a multi-antenna roof module, interface box, steering software, cables and brackets. The software/hardware package is designed for easy installation on most vehicles, including articulated tractors. The suggested retail price for the DGPS kit is $11,995; the RTK kit is $17,995, plus $2,000 for a 462- or 900-MHz radio. Contact AutoFarm, Dept. FIN, 45700 Northport Loop East, Fremont, CA 94538, 877/947-7327, visit www.gpsfarm.com or www.freeproductinfo.net/fin, or circle 150.