Under extended over-water operations, which statement is true regarding RNAV usage to meet navigation requirements?

• A. RNAV may not be used to meet navigation requirements.
• B. Two RNAV systems are required.
• C. RNAV may be used to meet the navigation requirements only if authorized in the certificate holder's operations specifications.
• D. RNAV can replace ILS in all procedures.

Answer: (C)

RNAV can be used to meet navigation requirements during extended over-water operations, but only if the certificate holder’s operations specifications authorize it. The OPS Specs spell out which navigation methods may substitute for traditional navaids on those routes and what conditions, equipment, training, and procedures must be in place. Without that written authorization, RNAV cannot be used to meet the navigation requirements. The other statements aren’t correct because RNAV isn’t categorically prohibited, there isn’t a universal requirement for two RNAV systems, and RNAV cannot replace ILS in all procedures—only where the operator’s approved procedures and authorization allow it.