The Starfleet Insignia Explained (2024)

Star Trek uses symbols to convey a lot of things, but none captures the eye or imagination quite like the delta. In the years since The Original Series first aired, fans have tried to determine the meaning behind the various insignia shapes we see in the show. To most, it seems that the iconic delta shape is some sort of ship assignment patch meant to represent the U.S.S. Enterprise.

Some arrive at this conclusion because they see various Starfleet personnel wearing a number of different insignia. However, like any puzzle without a key, it’s impossible to precisely interpret the meaning of these other insignia.

The hidden key to the puzzle was finally uncovered a few years ago. The discovery was a memorandum written by producer Robert H. (Bob) Justman tocostume designer William Ware (Bill) Theiss. The subject? STARSHIP EMBLEMS.

A copy of that memorandum has been digitized from the Gene RoddenberryStar TrekTelevision Series Collection (held in the Library Special Collections division of the Young Research Library at UCLA in Irvine, California) and is shown below:

This memo, written during the production of the episode "The Omega Glory," and referencing Captain Ron Tracey, nullifies the long-held assumption that Starfleet assigned different insignia shapes to starships during TOS. Theiss’ inclusion of an alternate insignia for theExeter's captain and chief medical officer, unfortunately, downplays how genuinely ubiquitous the delta insignia is within theStar Trekuniverse. As a result, fans of the series are left with conflicting visual information regarding the meaning of the insignia worn throughout the original series.

Nearly 50 years after Bob Justman wrote his memo, we now have the opportunity to clarify the use of each and every Starfleet uniform insignia used inTOS. With a wee bit of Scotty'singenuity, and a pinch of Vulcan logic, the complete picture of what Gene Roddenberry envisioned for the delta insignia should snap into focus.

There are six Starfleet duty insignia used in The Original Series:

In theStar Trekuniverse, the delta emblem is a direct descendant of the vector component of the old NASA (and later UESPA) logos in use during Earth’s space programs of the 20th and 21st Centuries. Those symbols were worn by some of the first space explorers and adorned uniforms and ships during humanity’s first steps into the final frontier.

The delta insignia was first drawn in 1964 by costume designer William Ware Theiss with input from series creator Gene Roddenberry. The delta — or “Arrowhead” as Bill Theiss called it — has evolved into a revered symbol and one that's synonymous withStar Trektoday.

The delta also conveys information about the wearer’s duties aboard ship using a series of division symbols. When paired with a distinctive, elongated “star,” the insignia represents someone assigned to the Command division aboard ship. When it displays the “planet” symbol, it represents the Sciences division, a stylized “e” stands for Engineering (later Operations), and a red “Swiss Cross” is worn by starship personnel assigned to the Nursing Corps.

Let’s continue our study ofStar Trek’s insignia with personnel assigned to other starships that are wearing the delta insignia.

Before we knew about this memo, we assumed that each ship had its own unique insignia, but there are problems that theory doesn't account for. For instance, does it bother you, or at least seem odd to see the surly guys in Starbase 11’s Officer's Club (in the episode "Court Martial") giving “their captain” a hard time over the presumed death of their mutual friend Ben Finney? Or, to see deceased crew members aboard theU.S.S. Defiant(in the episode "The Tholian Web") wearing the delta insignia?

If different starships had different symbols, why weren't they wearing them? Simple. The memo makes it clear that those Starfleet officers are not assigned to theEnterprise; they are simply wearing Starfleet’s standard-issue Starship Duty Insignia.

As you can see here, Theiss thoughtfully, if erroneously, provided both officers with unique assignment insignia patches, and in keeping with his fastidious reputation, insured both patches included their appropriate division symbols.

Early in TOS, we get our first look at non-delta insignia. In the episode "Charlie X,"Antares’ Captain Rampart and his first officer are wearing the Spacecraft Duty Insignia, which indicates that they are assigned to an auxiliary spacecraft serving in Starfleet's Merchant Marine Corps — just as Justman points out in his memo.

So how does Commodore Wesley in "The Ultimate Computer," or Commodore Decker in "The Doomsday Machine," fit into the spectrum of Starfleet insignia?

Well, let’s talk about commodores for a moment. A commodore is a flag officer rank, one position above captain. A starship captain usually commands a single vessel, but a commodore ordinarily commands more than one ship. Usually, commodores command a group of ships (either close to their flagship or distant), or in the case of TOS, they normally command a starbase.

In charge of evaluating the operational performance of the M5 computer while it's in total control of a starship, Commodore Wesley sits in temporary command of theU.S.S. Lexingtonto lead a battle fleet in war games against theEnterprise. Throughout the episode, Commodore Wesley continues to wear his Starbase Duty Insignia, while theLexingtoncrew would have been wearing the delta.

Unlike Commodore Bob Wesley, who was only in temporary command of theLexington, Matt Decker is a Flag Officer with permanent field command of a starship. In fact, he's the only Flag Officer we see inStar Trekwith a field command. As a consequence of Commodore Decker's rank and status as Commander of theU.S.S. Constellation(his flagship), he wears the Fleet Command Insignia denoting his status as a Flag Officer in the field. If we had seen Commodore Decker's crew (may they rest in peace), we would have seen the delta shape insignia in use on their uniforms. Commodore Decker's own first officer would have held the rank of Captain and worn the Starship Duty Insignia.

It should be noted that "The Doomsday Machine," which was filmed early in Season 2, is not referenced in Bob Justman’s memo. Some speculate that Decker’s absence from the memo is further indication of the inconsistent use of emblems inStar Trek, but that presupposes that the production staff missed that detail. However, the very existence of the Justman memo, and a whole forest of others just like it, demonstrates that the opposite is true.

The production team ofStar Trekworked diligently to ensure that every aspect of the future they were busy creating held up under scrutiny. Gene Roddenberry was notoriously rewriting scripts himself to ensure no less than exactly what he wanted ended up on-screen, and that fastidious nature permeated the entire production staff. That Decker’s unique emblem is not mentioned in the production memo indicates that his particular insignia isn't an error at all; but represents something else.

Check out Commodore Decker's insignia. Remember that when Theiss created the insignia for Captain Ron Tracey, he went out of his way to ensure it was emblazoned with a Command Star department symbol. Commodore Decker has no such departmental symbol in his insignia patch, which places it in the same design lineage as the Starbase Duty Insignia, which is also devoid of any departmental symbol.

At this point inStar Trek, we’ve seen a number of flag officers; but they have all worn the Starflower shape, which indicates assignment to a starbase, while Matt Decker alone in TOS series serves as a flag officer in permanent command of a starship. He is wearing an insignia that conveys his unique status, the Fleet Command Insignia, and if you look closely, you'll see that Matt Decker’s emblem is visually related to the Starbase Duty Insignia. Decker’s insignia is a stylized representation of an individual petal from the same “Evening Starflower” emblem that comprises the starbase symbol. This insignia isn't mentioned in the production memo because it's not an error at all.

Hopefully, by now, you can see how consistent theStar Trekcostume department really was in their use of insignia, and that Bill Thiess never repeated the error he made during "The Omega Glory" after it was pointed out by the memo.

Returning to the delta, Roddenberry and Justman intended it to be a very special symbol that communicates something important. The insignia worn on Starfleet uniforms is the equivalent of the badges worn by U.S. Service members — to show how they serve, not where they serve. Both men served with distinction in World War II. Roddenberry was an Army Air Corps pilot and Justman was a radio operator in the Navy. In the air and at sea, they understood the value of visual communication. In uniform, they themselves carried those values on their chests, on their collars, and on their sleeves. Twenty years after they wore their own various insignia, they helped to create something new — a symbol to inspire others. In the 1960s, the Starfleet delta had far more in common with the golden pin awarded to a NASA astronaut than a simple mission patch, and it was intended to equal that proud emblem in both use and sentiment.