Trustee

This vessel arrived off Burntisland yesterday.
It is the 'Trustee', a semi-submersible heavy transport ship.
It takes on ballast until the middle section is below water and then its load is floated into position before the ballast is pumped out again.

I presume it is here to collect a drilling platform for transfer elsewhere, so I'll be on the lookout for one getting towed into the Forth.