Useful links

Port authorities
Port of Amsterdam      portofamsterdam.nl
Port of Rotterdam        portofrotterdam.com
Port of Antwerp           portofantwerp.com
Port of Zeebrugge        portofzeebrugge.be
Port of Hamburg          hafen-hamburg.de

Companies
Bunker Detectives       bunkerdetective.com
Marpol Services          marpolservices.nl