Final answer:
A GPS-enabled personal navigation device is the most suitable for the trucking company's needs, providing reliability and map coverage without the necessity of internet connectivity or a data plan.
Step-by-step explanation:
Out of the options provided, the best choice for the trucking company that requires map coverage when internet connectivity is lost and does not require a data plan is a GPS-enabled personal navigation device. This device is designed to receive signals from a network of satellites, which means it does not rely on internet connectivity or cell towers to provide navigation information. Moreover, since it operates using GPS (Global Positioning System) technology, which was developed by the U.S. Department of Defense and is available without a data subscription, there are no recurring costs associated with its use for basic navigation features.
While GPS-enabled tablets and phablets can also utilize GPS signals, they often still require an internet connection for other functionalities and may lead to additional costs if data plans are needed. On the other hand, wearable smart glasses are generally more suited for personal use and may not be practical for the requirements of a trucking company. Hence, the personal navigation device is the most suitable option for professional drivers who need consistent and reliable map access.