I worked for a guy once who was an ex-swifty. I was mate on his boat, sweet little 32' custom sportfisherman. We ran charters on the weekends, and he would drink with the charter party, and about 2 in the afternoon, pass out at the helm. This was not usually a problem, as I sat on the bridge steps to get a good view of the baits, and would just run the boat too. One time he did it while we were circling a rig about 70 miles offshore, though, and I was in the cockpit. We missed tangling a rigger in the leg of the platform by about 2 feet, and that was the last time I worked with him.
He wouldn't talk about his time much, but he did say that the boat handled just like his swift boat. He had Stewart and Stevens double turbo'd intercooled detroits in it, and that boat would fly!
Not in relation to anything, just my experiences.