Actually it looks like they were able to maintain steerage but the seas were very confused - could be current vs wind-driven waves that brought in the cross waves. The spray is running about over the ship but then they get hit by waves coming in at an angle. Right near the end you can see what looks like land on the horizon, so shallower water would roughen the ride a lot - shorter period to the waves and more disturbance.
I had the same sort of ride in a 35 foot racing boat off the Oregon coast a few years ago... 4 days of 30-45kt winds had set a flow that crossed the main current and you'd come off the top of one wave to find one coming from the stern quarter... now I know what a pinata feels like :help:
The are under power, have the LB's intact, no obvious damage, but I bet no one was dining at the buffet and the smell was probably not sweet below decks. Give me a safety harness and good gear and I'd be on deck.. far better than to be below listening to the moans and retching with no horizon to fight the disorientation, but I know the rules wouldn't allow it for paying pax.
Rob