Final answer:
The standard format for dates in Navy correspondence is used for formal correspondence to maintain consistency and professionalism. Option C is likely the correct answer, indicating this format is always used for formal documents.
Step-by-step explanation:
The standard format for dates in Navy correspondence is typically used for formal correspondence. This means that option C, 'Always used for formal correspondence', is most likely the correct answer to the question of when the standard format for dates is used in Navy correspondence. The purpose of adhering to a standard format is to ensure consistency and professionalism in official documents. The standard format typically follows the order of day, month, and year, without the use of slashes or dashes, to avoid confusion, especially in international or military contexts where different date formats are common.