Helmy · Yacht Management
Marina in Amsterdam, Netherlands
Werfkade 4, 1033 RA Amsterdam
Marina on the IJ in Amsterdam-Noord with a harbour office on VHF 31. Yachting Pages lists yachts up to about 74 m LOA and 6 m draft; it belongs to a group with marinas in Rotterdam, Medemblik and Stellendam.
https://www.amsterdammarina.com
Every yacht service in Amsterdam
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.