OSV 6000 upgrade to 10,000

I have Master OSV 6000 and have now been on a 3400 GT OSV for more than 360 days, is there a way to upgrade to 10,000? nothing comes up in a search.

I don’t know, but . . . I have Master OSV 3000GRT / 3000 GT. I was told that I could sit for Unlimited Master, if I got 360 days of seatime sailing as Chief Mate on any vessel over 1600 GRT. That will never happen.

I believe it’s automatic. There might be a detail I’m overlooking, but the 6000 OSV has been superceded by the 10000.