Hemisphere GPS designs and manufactures innovative, cost-effective GPS and complimentary products for positioning, guidance, and machine control applications. Hemisphere GPS is a global company with sales in more than 35 countries and has succeeded by offering the right level of technology for the application.
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Hemisphere GPS Compass
November 2011- Pros:
- - Highly accurate GPS positioning
- - Accurate heading sensor
- - RS232 and RS422 connectivity
- Cons:
Jeff’s knowledge is amazing,
says Jack, who consulted with PYS before undertaking the replacement of his trawler’s electrical system. 
My battery monitor instructions say to use twisted pair wires. What are twisted pair wires and why are they important? 
