A pilot vessel of 25 meters in length is engaged on pilotage duty and is at anchor. She exhibits white over red all-round lights at the masthead. Which additional light or lights is she required to show, and what rule governs the anchor light requirement?

1. ✓ The anchor light, lights, or shape prescribed in Rule 30; the requirement is found in 33 CFR §83.29(a)(iii)Correct
2. B. Sidelights and a sternlight; the requirement is found in 33 CFR §83.29(a)(ii)
3. C. A single all-round white anchor light only, with no reference to Rule 30 required
4. D. No additional lights; the white over red masthead lights satisfy all requirements when at anchor