I tend to agree with Bunker barge, I have been in the Irish Sea in storm force winds and it is bloody frightening, even on a large sea going tug as the Rollicker. A freak wave happen everywhere, and a list of 60 degrees will on a marine diesel will set of a alarm which will after a short period shut the engines down, because the lube oil goes to one side and exposes the Alarm probe. A vessel I had was the Arrochar and she was broached and knocked over so that the bridge wings went under, her alarms were set to just over 30 degrees and they went off mercifully she righted in seconds, this happened in the Pentland Straits with a following sea.
The real question is why did she sail in that forcaste, company pressure? jobs are getting scarce now for British seaman and the Irish transport ferry service is a cut throat industry.
By the way, I could not sea on the TV, but did anyway sea if her anchors were deployed, although with that list and the seaway running, I expect no one could get near the windlass to release them.
As previously said let us be thankful no one perished and full praise to the Helio guys, as at the end of the day the vessel is only a lump of steel and can be replaced easily, people are not replaceable.