Final answer:
The first Black captain in the U.S. Navy was Samuel L. Gravely Jr.
Step-by-step explanation:
The first Black captain in the U.S. Navy was John Paul Jones. However, it's important to note that John Paul Jones was not Black; he was a white Scottish-American naval officer. The first Black captain in the U.S. Navy was actually Samuel L. Gravely Jr. He achieved this distinction in 1961.
Learn more about Black captains in the U.S. Navy