Bathy-500MF

Bathy-500DF

Multi Frequency 
Survey Echo Sounder

Dual  Frequency 
Hydrographic Echo Sounder

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Any single frequency of:
 33,40,50,200 or 210kHz

Interleaved Dual Frequency of: 
33/210kHz or 50/210kHz

or...any single frequency of:
 33,40,50,200 or 210kHz