Technical Data : Display 7-inch Color TFT LCD “Echo Color 16 colors (including background color) according to echo intensity. The background color is selectable from blue, light blue, white and black” “Basic Range Meters 5/10/20/40/80/150/300/600/1000 Feet 15/30/60/120/200/400/1000/2000/3000 Fathoms 3/5/10/20/40/80/150/300/600 Passi/Braza 3/5/10/30/50/100/200/350/600 *The basic ranges can be changed on the system menu.” Range Shift Up to 1000 meters (3000 feet, 600 fathoms, 600 passi/braza) Zoom Range Times 2,3,4 and 6 ranges Bottom Lock Expansion Range 5/10 /20 meters, 10/20/40 feet, 2/5/10 fathoms , 2/5/10 passi/braza Auto Mode Automatic adjustment of range and gain “Display Mode High Frequency (200K), Low Frequency (50K), Dual (200K and 50K 1/2 display on each), Zoom (200K and 50K zoom) and A-scope Display” “Zoom Display Marker Zoom, Bottom Zoom and Bottom-lock Expansion” TX Frequency 50 and 200 kHz (alternately transmitted) Power Output 600W TX period(millisecond) 3550