I did a 12 month contract for Hansens's in 2001-2002. It was definately an experience but I don't think I will do it again. It make's you think (you have plenty of time) after you have an engine failure about 60 nm from the boat and about 600 nm from land.
I worked for Hansen in '98. Winged Hunter's quote from "Big Eye Vet" is spot on. I had a horrendous experience with my drunken Captain who ended up attacking me..........Great story looking back!!
That reminds me of a very 'pleasant' story...I had a Korean fisherman hold a very sharp knife to my throat after I refused to give him a cigarette (very long story), after about six weeks of very very poor fishing. A tuna boat is not a nice place to be after a few weeks of poor catches...