CHC D380 Single frequency Conversion Echo Sounder System D380 is a frequency Conversion Echo Sounder System which is and produced by CHC factory . It is take the advanced Conversion technology and can be ... Read More
D580 Dual Frequency Echo Sounder Technical indicators Working frequency of high frequency 100~750KHz (adjustable) Low working frequency 20/25khz (adjustable) High frequency transmission power 500 w Low ... Read More