In the 1850 Billet and Rank listing, which designation corresponds to IWC?

• A. IWC O5
• B. IWC O6
• C. N6 O5
• D. CRC O4

Answer: (B)

The key idea is matching a billet to the level of authority it requires. The IWC designation refers to a senior, cross‑functional leadership role that sits at the high end of the officer ranks in this listing. That level of responsibility is encoded by the pay grade O-6, which is the benchmark for captains/colonels who oversee broad, complex programs and coordinate across divisions. So the designation that fits IWC is the one aligned with O-6, because it reflects the senior scope and authority of the billet. The other options imply either a lower level of responsibility (O-5) or use different prefixes that correspond to different systems, which don’t map to the IWC billet in this listing.