#set plans

If you remember this post, it seems like one of the changes made during Sirena's design process was that the wings were dropped quite a significant amount. Where the early concept art has the ship sitting fairly low to the ground, she is raised much higher when she reaches her final form.

Essentially, we went from a configuration that might have looked something like the version on the top to the actual model on the bottom:

This change increased the ship's clearance significantly.

For the non-imperial-measuring among us, the height of the ladder given in the schematic shared by Blass, 14' 10 1/2", translates to about 4.8m. However, when you line up the orthogonal view of the ship with the cross section, the length of the ladder is not really enough to reach the ground once the ship has landed.

(The green line indicates the bottom of the stairs.)

There is some speculation that maybe Sirena can fold up her nacelles for landing, and that might be true. There are rooms extending into the wings that would end up at an odd angle, but I suppose with artificial gravity, anything is possible -- if somewhat unlikely.

Still, if we presume Sirena's wings are rigid in general, the distance from the tarmac to the belly of the ship (here: the stage floor in the schematic) is a bit larger than 4.8m.

I wanted to adapt the ladder accordingly, but getting good measurements by converting between feet, pixels, and metres is a bit of a hassle. So instead, I simply used the measurements already on the schematic and extended the ladder so that the ship's clearance would be 5.5m or around 18ft.

This brings the total length of the ladder to about 21ft or 6.5m, and overlaid on the orthogonal ship view, it looks like this:

(The green line once again indicates the bottom of the stairs.)

As you can see, this length requires for the outer engines to fold up a little bit and would have the lowest point of the nacelles basically sitting on the ground. I personally think that would make a lot of sense, and in season 2 we did see that the outer engine pods are on hinges and can definitely fold down.

(It's subtle, but they do move back into their resting position towards the end of the gif.)

It was never confirmed that the engings can fold farther up as well, but looking at how they're attached, I think it makes sense that they could.

Now, in the adjusted S1 concept art of Sirena at the space port, the outer engines are in their normal positions and the wings are actually fully off the ground, with the ship resting on extended landing gear:

So, my extended ladder is the absolute minimum length needed to account for the dropped wings. In all likelihood the ladder would have to be even longer than that, because the clearance would be over 5.5m.

One thing that playing around with all of these views and measurements made me realize, though, is that La Sirena is quite a bit larger than I usually picture her. I have this realization about once every two or three months, so to make it easier to internalize, I asked the wonderful @regionalpancake to assist me.

Google helpfully suggests that 5.5m / 18ft is about half the size of a telephone pole or of three Michael Jordan's standing on each other's shoulders. It is also the size of...

... one average adult giraffe. (This is more or less helpful, depending on when you last went to the zoo, but I really enjoyed that as a visual aide.)

And because Regionalpancake is a good sport (and extremely proficient at adding animals to La Sirena), she also gave me this second edit:

(She also helpfully removed the spacedock workers who were a little to tall in comparison to Sirena. Hopefully, the friendly Averagely-Sized Adult Giraffe will make the ship's real dimensions slightly easier to gauge.)

So, now we have an idea of what might lurk beneath La Sirena's bridge!

I imagine in-universe, there is more stuff stashed under there than just the stairs, though. Perhaps the space gives easier access to the phaser banks in the nose of the ship, or to some other flight control or power distribution machinery. And there's still the question of why Picard, after a very emotionally draining conversation, chooses to head into this space rather than going straight upstairs to his cabin or to his study on the holodeck. (Yes, I know the Doylist answer is because it was the more dramatically satisfying blocking/staging choice, but on this blog, we like to dig for Watsonian explanations, too!)

My personal guess is still that there's some communal washroom down there, because those have to be somewhere on the ship, and that space would actually make sense, being in such close proximity to the bridge and mess hall.