The NSU is an affiliate of the ITF, a global union federation of approximately 700 unions from approximately 150 countries. The ITF uses its collective strength of its global affiliates to give seafarers a voice at an international level. The ITF has different industrial sectors, including one for seafaring.
The maritime unions that are affiliates of the ITF decide which unions should have agreements with which companies. They make these decisions based on the ownership and history of the company.
You can find out more on ITF's web pages. (Opens in a new browser window)