http://cabelas.com/cabelas/en/templates/product/standard-item.jhtml?id=0000962012684a&navAction=push&navCount=3&indexId=cat21380&podId=0000962&catalogCode=IF&parentId=cat21380&parentType=index&rid=&_DARGS=%2Fcabelas%2Fen%2Fcommon%2Fcatalog%2Fitem-link.jhtml.1_A&_DAV=MainCatcat21276&hasJS=trueI have been in plenty of boats rigged with transducers on this type of a bracket. You do not have to worry about knocking it off as if you get close that close to anything your t-motor prop/skeg will most likely protect it.
Lotta ins, lotta outs, lotta what have-yous