The JFE-400 echo sounders continue the tradition of enhanced depth technology with highly accuracy and reliability. It is a mandatory equipment for large vessels and the JFE-400/700 meets the IMO Resolution MSC.74(69) Annex 4. It is equipped with the AUTO function in the other ships interference prevention function. Optimal interference prevention processing works according to the usage conditions, it is possible prevent misidentification of interference waves emitted from other ships.