Any Electrical Control Equipment zone rated used in ROV Subsea Operations which is certified is worked on by Qualified Electricians (Not Domestic Electricians).
So your Answer is a Domestic Qualified Electrician is of no use at all.
Can the Domestic Electrician progress yes to be Qualified Electrician yes they could increase there basic knowledge and certs and would it become use full yes.
Will your knowledge be use full as a Mech Tech in ROV regarding electrics possible but you wont be working for any competent operator on there certified electrical control gear.
And like I said Comp EX is not for domestic work you are supposed to be Qualified Electrician and with out those Qualifications you will not be able to sign of Comp EX work any way.
So your Answer is a Domestic Qualified Electrician is of no use at all.
Can the Domestic Electrician progress yes to be Qualified Electrician yes they could increase there basic knowledge and certs and would it become use full yes.
Will your knowledge be use full as a Mech Tech in ROV regarding electrics possible but you wont be working for any competent operator on there certified electrical control gear.
And like I said Comp EX is not for domestic work you are supposed to be Qualified Electrician and with out those Qualifications you will not be able to sign of Comp EX work any way.