Ok, problem solved... MIP had no relevance :-)

Bjørn, thanks a lot! As it turned out, I had already photographed him nine years ago.

I checked these tugs before. None of them match this tug.

If MIP on the accomodation is of any relevance I found for Turkish flagged tugs (no photos here):

MIP-1, IMO 9604354, built 2010
MIP-2, IMO 9788265, built 2016
MIP-3, IMO 9803869, built 2016
MIP-4, IMO 9850422, built 2019 (March)

Cheers,
Jens