I am hoping to get into the design/research.
Plain and simple, you won't be directly doing design/research.
You may manage/direct efforts, but you're not going to be in the lab.
If you want to do that, you should look into the Reserve side of EDO.
That's one of the reasons they pick up direct EDO accessions instead of requiring doing URL work first.
There is a fair chance you will end up working in a shipyard managing shipbuilding. I mean heavy industrial work.
If that's not something you're OK with at all...you may want to consider other options.
Yup, that is my goal as well. I want to go for Naval/Mechanical phd during the time of service. Do you know does Submarine officer and SWO have equal opportunities to go to MIT? In the 1212-040 I mentioned earlier, they mentioned MIT for submarine ED option but no in the Surface ED option.
If you WANT to go to MIT and you have the grades/GRE to get in, you will get it. The MIT track is for the Naval Architecture/Mech E focused curriculum. The "regular" NPS track gives you more options in curriculum.