The affordable, new SI-TEX ES502 Fishfinder Module connects to your SI-TEX NAVMATE, ColorMax 6, ColorMax Wide, ColorMax 11, Explorer Plus, or Trawl Plot 12 Charting Systems to add full-featured color fishfinder capabilities.  

• View fishfinder or charting displays in either full-screen or split-screen presentations.
• Dual Frequency 50/200 kHz operation.
•   500/1000 watts of power.
• Real-time, multi-color A-Scope.
• Zoom capability to magnify any part of the image of a fixed rate 2x, 4x and by user-selected range.
• Other features include trip log; speed sensor; interference rejection and noise filter; shallow, deep, fish and temperature alarms.