The one common Captain

[Dînadan]

Plus that one should have been at least the Defiant-A already. Then they forgot again and made a newer Defiant-A.

I think only the Enterprise gets the lettering privaledge, otherwise the Saratoga would be on wingdings by now.

[Madner Kami]

Plus that one should have been at least the Defiant-A already. Then they forgot again and made a newer Defiant-A.

I think only the Enterprise gets the lettering privaledge, otherwise the Saratoga would be on wingdings by now.

Technically nope. There's one Prime-Canon example to the contrary: USS Yamato, NCC-1305-E. It is stated though, that this was a mistake done during production, done by a writer who wasn't fully aware of the limitations of the registration system. This was supposed to be fixed, but they dropped the scene from the script where the registration would have been stated by Riker, so the correction was never done, only for the scene to be then included regardless, with nobody responsible being aware of the mistake.
They retconned Yamato's registry onscreen lateron, three times actually. First to NCC-24383, which was only seen on a deployment list computer screen, then to NCC-71807, which is the definite and true registration and then there's the model of Yamato exploding, due to a computer malfunction caused by iconian software, which bears the registration NCC-71806.

On a technical level, the letter-suffix is only used for ships named Enterprise and only for ships that bear the name post Kirk's original 5-years mission. The reason being, that they want to honor this, for Starfleet and the Federation, ground-breaking 5-years mission.

There is one other canon-example though, but it's relevance can be debated due to the nature of the ship. It's the Wells-class USS Relativity, NCV-474439-G.
Also, there is the case of the second Defiant-class USS Defiant. She was supposed to be named Defiant-A, but for budgetary reasons they couldn't redo all the models and stock footage of the ship, so she never canonically got the suffix. As a rule of thumb, I suppose what remains is: If the ship is important enough to Starfleet-/Federation-history and is supposed to be a direct replacement of the ship bearing the name before, then the ship gets a suffix.

[cilantro]

Specifically, DS9's Defiant. Who's flying it today? Dax? Kira? O'Brien? What are all the side stations for, anyway?

Plus that one should have been at least the Defiant-A already. Then they forgot again and made a newer Defiant-A.

Meh. The way that I saw the Defiant was a glorified roundabout with guns.

[Archon_Wing]

On Archer, I agree.

Unfortunately.

[Xaios]

Plus that one should have been at least the Defiant-A already. Then they forgot again and made a newer Defiant-A.

I think only the Enterprise gets the lettering privaledge, otherwise the Saratoga would be on wingdings by now.

I wish I'd seen this comment earlier. Regardless, I must now clean off my screen.

[cilantro]

So I saw this youtube video on Janway's coffee thing (and I am not going to call it an addiction only because it seems that, yeah, it was supposed to be an addiction BUT also a massive joke as well- because of what she was addicted to; coffe):



youtu.be/BxaFLVIjj9g

[cilantro]

Here is a video that talks about Dear Doctor and also has the same view point as Sf Debris:


youtu.be/VaZwtxGSyzU

[Madner Kami]

Don't link to Steve Shives, ever.

[cilantro]

Don't link to Steve Shives, ever.

Sorry. I just saw this video and I wanted to share it because he actually has the same conclusion as Sf Debris.