One very informative source is the catalog of Consumers Marine Electronics, (800) 332-2628, www.consumersmarine.com . Another is West Marine, www.westmarine.com .
For information on specific brands, visit the following Web sites:
• Furuno, www.furuno.com
• Garmin, www.garmin.com
• Humminbird, www.humminbird.com
• Lowrance, www.lowrance.com
• Northstar, www.northstarnav.com
• Raymarine, www.raymarine.com
• Simrad, www.simrad.com
• Si-Tex, www.si-tex.com
• Standard-Horizon, www.standardhorizon.com
