https://www.tinboats.net/forum/viewtopic.php?f=5&t=16874&hilit=transducer+mounting
https://www.greatlakesscuttlebutt.com/index.php?src=news&srctype=detail&category=Press%20Room&refno=155
https://www.greatlakesscuttlebutt.com/index.php?src=news&srctype=detail&category=Press%20Room&refno=281
https://www.sternmate.com/