Northstars Explorer 457 range of color fishfinders have sophisticated sounder technology. With our ease-of-use engineering, in a range of sizes and single/dual frequency combinations to suit your needs. The Northstar 457 has abright HI-RES displays boast 640X480 pixels making these dedicated fishfinders a stunning addtion to a boat of any size.  5" VGA unit with fuel 640 x 480. Split and full screen view.  Like its big brother the Explorer 467, the 457 reveals water column detail like never before, thanks to dual frequency sonar paired with an outstanding 640 x 480 pixel color display. The 457 maximizes helm space and value, by putting all that power in a 5" screen. Fuel computer facility with additional hardware. SmartCraft ready.