"Black Box" Digital Sounder Module with HD Digital Technology.
HD Digital Sounder Module

• Digital Sounder Module adds HD Digital technology to Raymarine
  E-Series and C-Series multifunction displays
  
• 600 or 1000 Watt operation depending on choice of transducer
  
• Dual frequency 50/200 kHz
  
• Patented Raymarine HD Digital sounder technology

• E-Series SeaTalk hs network integration (optional SeaTalk
  hs crossover coupler or SeaTalk hs Network Switch is
  required)
  
• C-Series integration
  
• hsb2 networking compatible with "Plus" series radars,
  chartplotters and fishfinders

• Dual frequency operation (200/50 kHz)
  
• 1000 or 600 watt available output power depending choice of transducer
  
• HD Digital Auto Adaptive Gain control (no adjustment required)
  
• Patent Pending Digitally Adaptive Transmitter Receiver with infinite
  receiver bandwidth settings and digital filter
  
• A-Scope (Real-Time Display): Split second real time representation of
  fish and bottom features passing through the beam of your transducer right
  now, the history of your A-Scope is represented in the standard sounder
  image scrolling across your screen.
  
• Zoom Display: Auto or manual zoom magnification of any part of the 200
  or 50 kHz fishfinder screen image, (X 2, X4 or X6 magnification).
  
• Bottom Lock: The bottom lock feature, shows the bottom as a straight
  line, in order to help you detect fish close to the bottom and remove wave
  action from the fishfinder image.
  
• White Line: The White line feature helps distinguish between fish and
  the bottom, when fish are swimming close to the bottom.

Product SKU: E63069