Authorized Travel Days (ATD) uses Defense Table of Official Distances (DTOD) mileage calculation for these assignments.

• A. CONUS to CONUS
• B. OCONUS to OCONUS
• C. CONUS to CONUS and OCONUS to OCONUS
• D. CONUS to OCONUS

Answer: (C)

Authorized Travel Days relies on a standardized distance figure to turn travel into days of entitlement. The Defense Table of Official Distances provides those official, published distances between duty locations, so using DTOD makes ATD calculations consistent when the origin and destination sit in the same geographic category. That means moves that stay within CONUS (both ends in the continental United States) and moves that stay overseas (both ends overseas) use DTOD distances to determine ATD. When travel crosses categories—CONUS to OCONUS or OCONUS to CONUS—a different distance basis applies, not DTOD. So the assignments that use DTOD mileage are CONUS-to-CONUS and OCONUS-to-OCONUS.