I recently applied for an ETO-COC (Electro-Technical Officer Certificate of Competency) at MARINA as a requirement of my company for my next vessel assignment. Actually, this ETO-COC is a requirement for seafarers who will serve on-board vessels in capacity relevant to the duties and responsibilities of an ETO under Regulation III/6 of the STCW Convention. If you want to know the full details, kindly check STCW Circular No. 2016-04 from MARINA. I outlined in this post the requirements, procedure, fees, and my personal experience in applying for an ETO-COC in MARINA.