The career path of a container ship captain?

I do not believe it is that rare. I believe after getting an unlimited in power vessels (6 years), the unlimited in sail is just one more section that can be taken with one year experience with sail.

That surprises me a little; I would think that sailing, especially a large ship, would have enough of its own nuances that it would take more than a year to really learn them. And how many would bother? Seems like there wouldn’t be that many openings for sailing ship captains; although I saw a few sailing yachts on my trip that probably had a hired captain and crew.

What about steam; is that a separate rating from motor, and are there very many people who bother to qualify for it.