? Sea-Service changes?

Thanks Capt A. Pisses me off dammit. I took a licensing test not a credential test. I don’t remember the coasties asking me if I approved of this change. Here’s how it reads anyhow: OINNW (3/M) VSO Valid for vessels operating in the GMDSS. Then next page has 3/M AGT, Oceans, Radar Observer (Unltd). First Class Pilot AGT between Duluth, Gary and Buffalo, Radar Observer (Unltd). Able Seaman, any waters, unltd, Lifeboatman, Stewards Dept. (FH), Wiper.
The STCW page has the following gobbletygook II/1; II/4; IV/2; VI/1; VI/2;VI/3; VI/4; VI/5. I have no idea what this means.