BOTH INTERNATIONAL & INLAND A vessel aground would show the same shape to signify her condition as which vessel?

Correct Answer: Option D — None of the above

Rule 30(d) requires a vessel aground to exhibit the lights or shapes prescribed in Rule 27(d) for a vessel restricted in her ability to maneuver. No other vessel category, such as a dredge or survey vessel, uses the three-ball day shape, which is unique to vessels aground.