Final answer:
Devices that can replace smartphone navigation apps and function without internet or a data plan include a GPS-enabled personal navigation device, a tablet with offline maps, a smartwatch with GPS, and a laptop with GPS software.
Step-by-step explanation:
The mobile devices that could replace a smartphone navigation application, provide map coverage when internet connectivity is lost, and do not require a data plan include: 1) A GPS-enabled personal navigation device, which uses signals from satellites to determine exact locations without needing internet access; 2) A tablet with an offline map application that has pre-downloaded maps and can provide directions without internet; 3) A smartwatch with built-in GPS capability to offer navigation assistance independently; and 4) A laptop with GPS software installed that can likewise use satellite signals to navigate without the internet.
These devices are important in situations where internet access is unreliable or unavailable, demonstrating the versatility of GPS technology which was developed with significant government support and is essential for navigation across various platforms.