The RD 301 echo sounder remote display is made for use with the EA 400/ EA 600
and the EN 250 navigation echo sounder. It may also be used with other echo sounders,
if they have an NMEA 0183 output.
The RD 301 echo sounder remote display has it's own alarm setting. The operator
may select alarm depth from the menu. Maximum depth reading is 9999 metre and the
display has a resolution of 0.1 metre.
Brightness is adjusted on the front panel. Brightness can, optionally, also be
adjusted from an external dimming unit.