Вот что я у них на сайте нашёл:
I have a CEC for chief mate (Unlimited). Can I do an oral exam and get a UK Chief Mate COC?
No, you will first have to undertake all the written examinations and courses for the UK Chief Mate Certificate and undertake the oral examination for Chief Mate. You must seek written advice from The Maritime & Coastguard Agency, Seafarer Training & Certification Branch, Spring Place, and 105 Commercial Rd, SO15 1EG before starting any course of study.
I have a CEC for Officer of the Watch (Deck) Unlimited. Can I take the UK Chief Mate Examinations and get a UK Chief Mate COC?
Normally yes, you must seek written advice from The Maritime & Coastguard Agency, Seafarer Training & Certification Branch, Spring Place, and 105 Commercial Rd, SO15 1EG before starting any course of study.
I hold an EU Master COC. Why must I undertake a UKLAP Examination?
EU Directive 93/52 requires recognition of equivalent qualifications across Europe unless a substantial difference has been identified. The UK believes that there is a substantial difference in domestic legislation between EU states regarding shipboard operations and so requires a test or adaptation period. This is common across most EU states.
http://www.mcga.gov.uk/c4mca/mcga07-home/workingatsea/mcga-trainingandcert/mcga-cec/dqs-st-stc-cecfaq.htmПолучается можно сдать у них экзамен на чифа и забыть про Эстонию