Passengers who had boarded the 141-foot Seastreak Wall Street in Atlantic Highlands, New Jersey, and were queued up to disembark in New York, were thrown to its deck by the impact of the hard landing.
People were thrown through the air as the commuter ferry slammed into a pier, according to passenger Brett Cebulash, 50, an attorney who regularly rides the ferry, which has a monthly commuting cost of $655 (£409).
People who were standing up flew because of the impact.It was a normal morning, we were rolling into the dock and then they hit something. There was a sudden impact
The boat was travelling on calm waters at between 10 to 12 knots, or about 11.5 to 14 miles per hour when it crashed into the pier, New York City Department of Transportation Commissioner Janette Sadik-Khan said.
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Armed police have carried out a raid apparently linked to Wednesday's deadly terror attack in Westminster.
Cheryl Grimmer vanished from inside a beach shower block in Wollongong, Australia, in 1970, when she was just three.
Pc Keith Palmer was on the front line and because of his actions, the Westminster attacker was unable to kill anyone else.