It has been a long running debate in the ROV industry as to whether someone who is required to isolate an ROV prior to maintenance should have an electrical background, qualifications, and experience.
No training course can automatically make someone competent, and competence can only be achieved by successfully demonstrating a specific task over a period of time in different scenarios. For example, the competence assessment within the MTCS High Voltage course requires someone to supervise the electrical isolation and ensure it is carried out safely and in accordance with procedures.