What type of device could replace a smartphone navigation application, providing map coverage without requiring an internet connection or data plan?

A GPS-enabled personal navigation device is specifically designed to provide navigation assistance using GPS technology, which operates independently of an internet connection or data plan. These devices use satellite signals to determine the user's location and provide directions and map coverage based on preloaded maps stored in their internal memory. This makes them reliable for navigation purposes even when cellular connectivity is unavailable, such as in remote areas or during travel in regions without mobile service.

In contrast, a smartphone and a tablet typically rely on internet connectivity to access map data and navigation services, meaning they often require a current data plan to function effectively if the user is not in a Wi-Fi zone. While both can provide navigation capabilities via apps when connected, they cannot replace a dedicated navigation device for offline use effectively.

A fitness tracker primarily focuses on health and activity tracking features such as step count, heart rate monitoring, and other health metrics. Although some advanced models may come equipped with GPS, they are not tailored for navigation and do not have the robustness in terms of map coverage and route guidance that a dedicated GPS navigation device provides. Thus, for reliable offline navigation, the choice of a GPS-enabled personal navigation device is the most suitable option.