Nederlands naar Engels Overig Scheepvaart, zeilen, maritiem

This is a translation for a shipping company and I wondered if anyone in the know can tell me the precise term to use for this. At the moment I have translated it as 'navigation skills certificate'.

Here is an example of a sentence containing the term:

Het is tevens mogelijk om het vaarbevoegdheidsbewijs digitaal aan te vragen via de website van het Kiwa.

There is also this website which would be a brilliant help if it also existed in English:

http://www.kiwaregister.nl/register/