You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
--------
Question: Category: WORLD GEOGRAPHY 
Clue: The name of this large port city on Western Europe's Schelde River literally means "at the wharf"

Answer: antwerp


Question: Category: PASTIMES 
Clue: The FCC assigns call signs, like N8DNR, to use in this hobby

Answer: ham radio


Question: Category: HISTORY'S MYSTERIES 
Clue: The Navy doesn't like to attribute the loss of the USS Cyclops to forces in this spooky area

Answer:
the bermuda triangle