You can find info in Atlantic towing publication http://content.yudu.com/web/3yub0/0A403p4/MR008Winter2017/html/index.html?page=10

Must be a custom-built then, PSV 5000 looks different on drawings there.

Hello Denis.
PSV 5000 series ,4 ships built at Damen Galati.
Yn 552039 9750581 ATLANTIC HERON
Yn 552040 9750593 ATLANTIC GRIFFON
Yn 552041 9750608 PAUL A. SECUTA
Yn 552042 9750610 ATLANTIC SHRIKE

Regards
René

Can't seem to find such series on Damen's site, is it a one-off? Looks like a PSV but her aft deck isn't long enough & the bow/accommodation looks very massive & there's no side door for the ROV comapred to her sistership ATLANTIC HERON. Nothing about these vessels on atlantictowing.com either.