When approaching a bridge or other structure where space is tight the best move is to slow down and ensure you have enough clearance. Before you reach the point of no return, the one where damage is inevitable, it's best to be certain that you're not going to clip the VHF antenna or knock the radar off into the water. Unless you're like this week's Boating Fail and enjoy scraping along the underside of bridges.
And please, pull in your fenders while under way.
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