| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| While in Paris, Robert Fulton became fascinated with developing this, which he called a "plunging boat" | submarine | $400 | J | INVENTORS | 1998-09-17 | #3224 | |
| French inventor Charles Brun used compressed air to expel water from the ballast tanks of one of these ships | a submarine | $1,000 | DJ | INVENTORS | 1993-12-28 | #2147 | |
| 1st one to attempt sinking a warship was the "Turtle" in the Revolutionary War | a submarine | $500 | J | INVENTIONS | 1984-12-12 | #68 |