You could find details of the new online procedure on NMA's web-site.Please follow the link:
GMDSS Endorsement is issued to non-Norwegian citizens holding an ROC- og GOC-certificate, and serves as deck officer on Norwegian vessels. Telenor kystradio is the delegated authority by the Norwegian Ministry of Trade, Industry and Fisheries, to issue endorsement as well as radio operators certificates.Please follow the procedure here:
http://kystradio.no/bedrift/lisens-sertifikat-og-endorsement/gmdss-endorsement/