Which essential task can travelers accomplish using DTS?

Travelers can accomplish the essential task of creating travel reservations using DTS (Defense Travel System). This system is specifically designed to facilitate official travel for Department of Defense personnel and provides a centralized platform for submitting travel requests, managing itineraries, and making accommodations. By using DTS, travelers can easily plan and execute their official travel needs, ensuring compliance with military regulations and streamlining the process of securing necessary reservations.

The other options do not align with the primary functions of DTS. Booking personal vacations is outside the scope of DTS, as the system is strictly for military and government-related travel. Managing airline tickets may refer to ticket changes or cancellations, which is also a service offered through DTS, but the core function focuses more on reservations rather than ticket management. Maintaining travel records for the public does not fit within the purpose of DTS, as it primarily serves military personnel and is not intended for public records management.