How do I get to the harbor of the Island of the Francos?


Hint 1 of 7:
You can't get to the harbor until you've been given the pisto-laser by the
dissidents.

Hint 2 of 7:
The entrance is through the refinery.

Hint 3 of 7:
Turn left as you're facing the refinery from the Franco village, and you'll
find a room with a door that you can't open.  The harbor is beyond those
doors.

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