I’m not trying to.
One would think that if there’s no limit printed beside it then there’s no limit but they’re kinda weird about printing the limits. Your OICNW has no tonnage limit (2M Unlimited) but your Master does.
Despite that, you’re always restricted to your national license. Example, with a Master OSV 10,000 GT license, by the STCW Master endorsement, there’s no tonnage limit or trade restriction to OSV printed beside it. Personally, I think that’s a mistake and that they should print the tonnage and “restricted to offshore supply vessels” on it.
I think they’re fucking up by not printing everything on both sides. Print the GRT and GT both on the national side (how else can you be “restricted to your national license” if the equivalent GT isn’t also printed there) and print any GT and trade restrictions on the STCW side.