The "L" designation identifies this as the Low CHIRP frequency variant, transmitting at lower frequencies for maximum depth penetration rather than the finer target resolution a higher-frequency transducer gives in shallower water — the right choice for anglers prioritising deep-water performance on a metal-hulled boat, such as an aluminium fishing or workboat. As with the bronze-housed B175/B265 family elsewhere in this catalogue, the tilted element is fixed at the specified angle inside the housing so it points straight down at the water once installed on a hull with matching deadrise, and the 8-pin connector confirms compatibility with a specific generation of Garmin sonar-equipped displays. Garmin sells the SS175 family under its own accessory branding specifically for guaranteed compatibility with its chartplotter range, and the stainless housing is a meaningfully more expensive option than bronze, reflecting the corrosion protection it provides on metal hulls.