The pedant in me thought that it was The Grotham (not Grothan) Steamship Line of Panama. I think it was also listed in Lloyds as such. The Mi-Amigo was also listed as being owned by Vagabond Films, doubtless another of Ronan's enterprises when he was involved in movies.

The World Mission Radio issue of being on an emergency frequency was mentioned to Chicago but apparently he shrugged it off of being of no consequence. The authorities were likely looking for an excuse anyway and the weasel DTI used the Dutch to do their dirty work. Was it more than coincidence that August 19th 1989 marked the sixth anniversary of Caroline returning from The Ross in 1983?