UFIV transfer or upgrade

Hey guys, I’m looking for some advice. I hold a UFIV (Uninspected Fishing Industry Vessel Chief) license. I also have my DDE4000. I started my career in commercial fishing and went to get my Chiefs license. Problem is that I have since left commercial fishing and I’m trying to figure out my next plan of attack. I don’t believe the UFIV applies to anything other than fishing. I’m on a dive support vessel now and I would like to upgrade to Chief OSV or Chief Limited. Maybe test on the DDE unlimited first. Could I someway transfer my UFIV To Chief OSV? Any advice or opinions are appreciated.
Thank y’all and stay safe out there.