I like what you were going for here - the last thoughts of a doomed man, noble sacrifice and all that - but the way the story was structured made it read very disjointed. I was continually unclear whether I was reading "present" events, flashbacks, reminiscences, reminiscences of flashbacks, flashbacks within reminiscences, or some other configuration. Not helping this was the way you introduced the technical slang - e.g., the fact that navy crews would call their EV suited technicians 'tangerines' is a great bit of very true-to-life worldbuilding, but the way it was first used, with no context given until two scenes later, I found very confusing. Again, I like what you were trying to do, and there's definitely a lot of promise here - I appreciated the succinct and effective characterization of the background characters, for example - but this could have used a second set of eyes, and another draft or two, for clarity and readability.