[Already__Taken]

fishing boats and military often have it off btw.

[stainablesteel]

fishing boats turn it off when they're in places they're not supposed to fish

[AllegedAlec]

Chinese fishing boats specifically.

[pvaldes]

Spanish also. And probably many other, seems a common trick.

[wlll]

Also British ones, though to be fair to them a fair number do actually have it turned on in the areas I'm in.

[wlll]

Yeah, I have experienced this as a sailor.