In DTS, what must be done to add a new traveler to the database?

To appropriately add a new traveler to the database in the DTS system, the process involves manually inputting the traveler's details. This step is crucial because it ensures that all necessary information, such as the traveler's name, contact details, and identification numbers, is accurately recorded in the database. By manually entering the details, it allows for real-time validation and ensures that all inputs meet the system's requirements, thereby reducing errors that could arise from miscommunication or incomplete information.

While the other options involve necessary actions, they do not directly pertain to the process of adding a traveler. For instance, submitting a request for a traveler information update or completing a traveler application form may be relevant in other contexts but do not directly contribute to the immediate task of inputting a new traveler's data into the DTS system. Requesting approval from the traveler’s department is more about obtaining authorization rather than executing the actual addition of the traveler's information, which is why manual entry is the correct focus in this context.