Lieutenant DePaul was a Starfleet officer who served as both a relief navigator and a relief helmsman aboard the USS Enterprise under Captain James T. Kirk in 2267. (TOS: "Arena", "A Taste of Armageddon")

Helmsmen of the starships Enterprise
Enterprise NX-01:	Mayweather • Hutchison
USS Enterprise:	DePaul • Hadley • Hansen • Kyle • Leslie • Mitchell • Number One • Rahda • Spinelli • H. Sulu • Walking Bear
USS Enterprise-A:	H. Sulu • Valeris
USS Enterprise-B:	D. Sulu
USS Enterprise-C:	Castillo • Fredericks
ISS Enterprise NCC-1701:	H. Sulu
USS Enterprise (alternate reality):	McKenna • H. Sulu