The watch and the day seem unending. The week ahead an eternity. It's not because the hours don't pass. They do, finally. That part doesn't matter much.
Time passes in a relative weirdness.
Your 3 buddies here seem to be the only people for miles. The world they think about, talk about, and draw strength from is far away. Each underway period feels like a prison sentence you serve - An overwhelming, total disconnection from your home and family life, restricted to the enclosed world of the small ship. Then you are released - when we return and you are suddenly back in public and eating at Taco Bell again. Then the term is served again during the subsequent deployment.