Yes. I have those RYA/MCA master offshore certs. I also have the NZ SRL 24m - they would not give me the NZ coastal master because they (MNZ) wont recognize my sea time as appropriate (not on NZ vessels, or under NZ certification), although they did recognize it for my NZ Yachtmaster <24m. I have all the other ancillary tickets and requirements.
So an example is this. For RYA/MCA the change from sail to power ticket is a 3 hour practical test (in power vessel) and an interview. Seems logical, navigation is navigation. For NZ, it's a completely different training course, different sea