Humminbird Side Imaging Forums
Other Interest => DIY - Side Scan Sonar and towfish => Topic started by: rjscuba on August 09, 2015, 11:20:24 AM
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Everything is working and I will post some pictures as soon as I get some. I tested in 132 ft of water with the fish running at 75 ft and 100 ft. I have 215 ft of cable all soldered sealed and one connection to the 999 unit. The cable is 7/16 dia with a rope of 3/8 dia this helps to retrieve the fish since I'm using the Armstrong retrieval system. The cable is Cat 7 underground (purchased from Certicable) and is on the stiff side but seems to work well. I've attached a picture of my side scan and a picture of the cable. There are still some things I need to do but I might wait until this winter because I want to get it out on the water. My thanks to this group for the help.
Rick
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Hi Rick, your gear looks to be well built with a very robust towfish. I'm looking forward to see your results!
Regards,
Rickard
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and another towfish ;)
good job, post your pictures, it look heavy, there's a dive bottle ?
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Hi Rick
Your towfish looks very solid, look forward to first scans.
mvh
Rüdiger
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I made the towfish out of an old air cylinder with a shaft and welded fins. I melted some lead in the nose. I wanted it heavy and strong. there is also 12 feet of chain before the rope and a break-away on the fish. Where I'm going to scan will have unknown structures and debris. With all the drag that the rope/cable will have I'll need the weight to keep her down.