I can get a good 7 to 8 hours of uninterrupted sleep if I go to bed somewhere between 4 am and 6 am.
Once in Korea, I slept for at least 16 hours. I was an augmentee attached to an airborne platoon that did a job I didn't know how to do. I also wasn't airborne. We were on a completely Korean military post. We lived in a tent and slept on cots. I was given a day off during the middle of the exercise, but there wasn't **** for me to do, so I slept.
The unit I was attached to was stationed in Korea, about a 40-minute drive from where we were. I was stationed in Hawaii, about 5 thousand miles away. They got per diem. I didn't.