Portable fish finder holder.
thingiverse
A ball & socket type holder for portable fish finder. Use this mount from my fishing rod holder design. http://www.thingiverse.com/thing:998784 The fish finder is one of these.http://www.ebay.com.au/itm/100m-Sonar-Sensor-Fish-Finder-Alarm-Transducer-Portable-/251885304358?hash=item3aa588ba26
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