The HSV is how we got over to Korea this last time and how we got back.
It is a really neat vessel... basically a HUGE catamaran on jet-ski's.
The ride over there, the seas were pretty rough and I would say a majority of the Marines got sea-sick.
It is not really that bad of a ride.
The inside has seating, similar to that of an airline; the seats some-what recline and are set up in rows with aisles in-between. There are no stewardesses, but there is a mess-deck we man ourselves and can use if we think ahead to bring food.
As for the ride back, it seemed to be a much better trip as far as the sea states were concerned. We experienced far less sea-sickness and I must say, morale was MUCH higher!