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                                                                     Tow Fish User Guide                                

 April 2020

             P.1 

Table of Contents 

Introduction .............................................................................................................................................................. 1 

Tow Fish Quick Start

 .......................................................................................................................................... 2 

Setup Hydrophone ............................................................................................................................................ 2 
Assemble Configuration ................................................................................................................................. 2 
Deployment ......................................................................................................................................................... 4 

 Autonomous Deployment ......................................................................................................................... 4 
Cabled Deployment ..................................................................................................................................... 5 

Appendix A .............................................................................................................................................................. 6 

Double Eye Cable Grip Installation ............................................................................................................. 6 

Female Connector End 

 connector without pins ............................................................................. 6 

Male Connector End 

 connector with pins ......................................................................................... 7 

Appendix B .............................................................................................................................................................. 8 

Deployment Recommendations .............................................................................................................. 8 

 

Introduction 

The 

Tow Fish

 allows users the ability to deploy an icListen Smart hydrophone behind a 

vessel with an autonomous or cabled deployment.  

The Tow Fish is a towed underwater depressor designed by Dartmouth Ocean 
Technologies. The Tow Fish allows users tow a hydrophone at a constant depth behind a 
vessel while shielding the hydrophone sensing element, reducing flow noise. Ocean Sonics 
has a custom designed mount to use with an icListen hydrophone.  

Users can use a Tow Fish to conduct underwater research and marine mammal monitoring. 
The Tow Fish minimizes drag and maintains even depth improving the accuracy of your 
data collection. The Tow Fish is the perfect tool for deploying towed arrays, maintaining 
compliance while performing seismic surveying or marine construction. 

 

 

Summary of Contents for Tow Fish

Page 1: ...Tow Fish User Guide April 2020 Version 3 0 Doc 12109...

Page 2: ...l with an autonomous or cabled deployment The Tow Fish is a towed underwater depressor designed by Dartmouth Ocean Technologies The Tow Fish allows users tow a hydrophone at a constant depth behind a...

Page 3: ...see below b Two bands on the hydrophone will line up with clamp positions on mount c Secure the hydrophone with the 2 top bands of the clamps and tighten the hex screws in place with a Hex Allen key...

Page 4: ...eye hook b If you are using cable grips loop the cable grips through the oval quick link a rope can be used as a secondary line 7 Ensure the rope and or cable grips are being used as the tension memb...

Page 5: ...ecommendation 3 for further details 6 Once the desired rope length is paid out the rope can be tied off to a midsection point on the vessel 7 Increase the vessel to the desired towing speed For best r...

Page 6: ...Tow Fish User Guide April 2020 P 5 Cabled Deployment...

Page 7: ...to the icListen hydrophone install the first cable grip 4 Place the cable grip over the end of the cable with the two loops closest to the connector 5 Push cable grip over the cable 6 Measure approxim...

Page 8: ...equipment 14 Place the cable grip over the end of the cable with the two loops closest to the connector 15 Push cable grip over the cable to the measured distance 16 Secure the cable grip with the two...

Page 9: ...ill be collected on the hydrophones while being operated at speeds between 1 to 5 knots Reducing speed will minimize flow noise engine noise and maximize the signal to noise ratio of your target sound...

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