All officers who have to comply with the requirements of the STCW Code must have their GMDSS Certificate endorsed by the Maritime and Coastguard Agency (MCA).
To obtain an STCW endorsement you must return a completed STCW Application Form MSF 4354 Rev 0921 together with supporting documentation to the MCA
Documentation should be sent to:-
Deck & GMDSS Section
Seafarer Training & Certification Branch
Maritime & Coastguard Agency
105 Commercial Road
Telephone: +44 23 8032 9231