I disagree with this, because Viking Sally in its reincarnation as Wasa King was only ever designed to commute between Finland and Sweden, and there was only few hours of open sea, as it always stopped at Mariehamn in the Åland Islands on the way, after which it was open sea until the Stockholm archipelago. If there are any problems, it is easy to bank the vessel at a nearby skerry. M/S Amorella on traversing a narrow band of islands actually got grounded inadvertently the other year.
When it was purchased by the Nordstrom & Thule/Estline, suddenly she was doing twelve hour journeys on open sea.
Nobody know why the vessel was belting along at 15-18 knots and failed to head for shallow waters.
The JAIC never bothered to investigate what was going on here.