Re: I don't get it...
"As for the technology being used; AIS? ESM (C and R)? A submarine tailing a ship? "
Sea Shepherd claim to have evidence of Japanese whaling in Australian economic zone waters where whaling is banned. One of their complaints is that the Australians won't send out observation aircraft to verify - remember that a P8 has more than enough range to do this and they're supposed to be patrolling the areas anyway.