In cases of erroneous charges, what must be identified along with the challenge code?

The correct choice is the Routine Identification Code. In the context of addressing erroneous charges within Navy logistics, a Routine Identification Code is essential as it helps in tracking and managing financial transactions effectively. This code aids in ensuring that the challenge raised about erroneous charges is adequately documented and processed. By including the Routine Identification Code, personnel can facilitate a more efficient review of the transaction, help identify the source of the error, and ensure that necessary adjustments are made in a structured manner.

The other options, while potentially relevant in various logistical or financial contexts, do not specifically align with the requirements for addressing erroneous charges. The Location code pertains to a specific physical place or facility, the New fund code relates to different financial sources or budgets, and the Unit Identification Number is typically used for identifying specific units within the Navy. None of these directly correlate to the management process of disputing incorrect charges like the Routine Identification Code does.