Get NI Full DP having DNV-GL Full DP Ticket

Hi Guys !

I’m working as a Master DPO with DNV-GL Full DP License but I also want to get a NI full DP License as it is more demanding on the shipping market.
Kindly advise what might be applicable solution to obtain NI full DP License, taking into consideration that I already have DNV DPO license?
Except DNVGL Full DP I have got NI DP basic cert. As per NI scheme I shall pass DP simulator course + examination to get NI Advanced. I’ve got enough DP Sea Time for NI Full DP but it won’t be accepted until I get Advance cert. Currently I’m on the vessel and don’t know when leave. Could you please advise how to be better in my situation. Thanks.