In "Star Trek: The Motion Picture," the logos would incorporate a circle behind the delta shape, and an officer's department would also be indicated by a badge's color. There were six colors for ...

Star Trek's delta symbol evolved from ship-specific to ... logo that bears a striking resemblance to Starfleet’s iconic badge. The use of the delta in military and aerospace organizations ...

I have a Star Trek: Discovery theory that can explain how the USS Voyager got lost in the Delta Quadrant in the first place.