It's called a stump jumper. Built in tightwad mo. I just installed one a few weeks ago on a Lowe with Lowrance hds. They are easy to install if he makes one for your unit. They are spring loaded and designed to lift up when contacting a stump and then drop back down automatically. The are a little pricey but well made and cheaper than a new transducer if ya hit something. Just Google stump jumper transducer mount