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That is called a watertight deck connection.
PERKO Watertight Deck Connections | West Marine
The other is for a navigation light like this one.
PERKO Pedestal Mount Bi-Color Navigation Pole Light | West Marine
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Crappie Wall Hanger II
That is called a watertight deck connection.
PERKO Watertight Deck Connections | West Marine
The other is for a navigation light like this one.
PERKO Pedestal Mount Bi-Color Navigation Pole Light | West Marine
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