[NautiNurse]

My first thought was that perhaps the ship had a glancing blow with a submarine. Don't know whether that could cause the list in this case.

Agree those ships don't turn quickly, but they can turn on a dime with the thrusters.

[BritExPatInFla]

The possible cause being bandied about is similar to 'Uncoordinated Turns' which happen in an aircraft when the rudder and ailerons are turned in 'opposing directions' for lack of a better term. they think the thrusters/stabilizers and rudders moved in opposite turn directions.

[Dog Gone]

I don't claim the slighest expertise on that. The cruise line is blaming it on a massive steering failure, so maybe something made the rudders, thrusters, and everything else suddenly kick in.

The idea that it was a terrorist attack blows my mind, but everything since 9/11, including a smidgeon of coffee creamer on the counter in the coffee bar at the office, has been attributed to terrorists, at least temporarily.