I was really surprised to find this vessel on the internet. I had the miserable pleasure of being on the Navy crew from about April '68 till the end in '71. I never knew until now if the project was still classified. Therefore, I will not talk about anything the tug was used for. However, I can talk about the sea keeping qualities of this vessel.
Barf is about correct.
I don't know of anyone that didn't get sick at least once. I don't know of may people spitting up blood though. One fellow did put his false teeth over the side by accident. The largest roll that I ever heard of was 45 degrees. They had a speed range of around 5 to 13 knots.