Hi Mike,
I was told you get the Roam Unlimited plan (£100 per month) with a Starlink Mini kit (costs around £200 currently). This gives you up to 12 miles offshore. Then you toggle the 'Ocean' setting when you set off and pay a couple of £ per GB of data when crossing the Atlantic (other oceans are available).
Then when you arrive it works for another 30 days... and then you have to return it to home to reset the 30 day countdown or pay £250 per month.
...per my conversation with Starlink yesterday. YMMV
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