Tilted-element thru-hull transducers like the B175 family are installed nearly flush with the hull, with the ceramic sensing element itself fixed at an angle inside the housing that corrects for the hull's deadrise so the element still points straight down at the water regardless of the hull shape around it — the 0-degree version specified here is matched to boats with minimal hull deadrise at the mounting point. Low CHIRP frequency transducers like this are the right choice for anglers prioritising deep-water penetration (offshore or deep-lake fishing) over the finer resolution a higher-frequency transducer gives in shallower water, and the 8-pin connector confirms compatibility with a specific generation of Garmin sonar-equipped displays or modules.