Garmin Fishfinder 90 Transom

The Fishfinder 90 also offers Ultrascroll which allows boaters to get a much faster refresh rate on their sonar display. AutoGain, as well as user adjustable gain, is also standard on all of Garmins new fishfinders.

• Black-and-white FSTN display, 2.2 W x 3.2 H, 4-inch diagonal, 64 x 128 pixels
  
• Patented transom/trolling mount transducer
  
• Dual-beam transducer with user-selectable narrow (14) or wide (45) view to see more fish in shallow water
  
• Ultrascroll high-rep-rate sonar
  
• Automatic display re-scaling on range change (no more vertical lines with range changes)
  
• New AutoGain technology to see more fish
  
• New sounder design featuring excellent shallow-water performance
  
• Incandescent backlight for display and keypad
  
• Power output: 100 watts (RMS) 800 watts (peak to peak)
  
• Depth: 600 foot
  
• Unit dimensions: 4.72 W x 4.94 H x 2.43 D
  
• See-Thru technology: shows weak and strong returns simultaneously
  
• Power down backup of settings: customer settings are not lost when the unit is turned off
  
• Whiteline
  
• 2X and 4X automatic and manual zoom
  
• Alarms for fish size, shallow water, deep water, low battery
  
• Battery voltage indication