INLAND ONLY Which statement is TRUE concerning lighting requirements for Great Lakes vessels?

Correct Answer: Option A — An all-round white light may be carried in lieu of the second masthead light and stern light.

Inland Rule 23(b) specifically permits vessels operating on the Great Lakes to carry an all-round white light in lieu of the second masthead light and stern light required by the International Rules. This provides a practical exception for the unique operational requirements of Great Lakes navigation and vessel design.