Yes, I assumed the Equatorial Trench was the one the Rebel fighters journeyed down to the exhaust port, event though I also realize it didn't make any sense given what we knew of the Equatorial Trench from the landing bay scenes. Now we knew (and know why we should have known) why.
[h/t +J. Steven York]
The Death Star and the Final Trench Run
Today, @vickschutz and I learned a detail about “Star Wars” (1977); it’s totally right there but we never grasped it. — Todd Vaziri (@tvaziri) February 26, 2016 Star Wars fans pride themselves on knowing each and every detail…
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+Russell Henmi should see this
I never assumed it was the "equatorial trench" at the end of the movie. There are hundreds of smaller trenches all across the surface of the Death Star. What I found interesting in Rogue One is that in several shots the dish was shown in the SOUTHERN hemisphere, rather than the north, where we see it in the original trilogy. Of course, this makes you think it is "upside down", which is stupid, as the Death Star as so much mass it likely has it's own gravity, making anywhere on the surface the right way up… also space has a Z axis as well as X and Y, we're just so use to thinking about directions on a flat plain.