Helmy · Yacht Management
Marina in Rotterdam, Netherlands
Rijksboom 90, 3071 AX Rotterdam
City marina in Rotterdam with a harbour office on VHF 31. It is a sister marina of Amsterdam Marina, and Yachting Pages lists yachts up to about 20 m LOA.
https://www.rotterdammarina.com
Every yacht service in Rotterdam
All marinas and harbours on Helmy
Helmy lists marinas port by port, free, with no account needed to look. It is also where a boat keeps her own papers, manuals, log book and orders.