The HDS-5 has an exclusive high-resolution 5 in/12.7 cm display, at an attractive, entry-level HDS Gen2 price. While the splitscreen view with chartplotter and Broadband Sounder™ is a popular choice, options also include a three-window display. Available in a variety of transducer-pack options: 83/200 kHz for inland/freshwater uses. 50/200 kHz for deeper Great Lakes/coastal saltwater uses Also compatible with Airmar® in-hull or thru-hull transducers – for deeper, saltwater applications One waterproof SD card slot to load high-detail charting options. Users can also and save sonar and navigational data, and upload future HDS software feature updates. HDS built-in cartography options: Americas*: Choose the Lake Insight ™ model option for intuitive, life-like inland, freshwater mapping views; or, select the Nautic Insight™ model for detailed coverage of U.S. coastal areas. Worldwide (non-Americas): Navionics® world background map All HDS models are fully compatible with third party mapping solutions including Insight HD and Fishing Hot Spots® PRO, as well as Navionics® Gold, Platinum and Platinum+ with TurboView® for the best possible chartplotter experience.