The vessel was headed toward Martinez, officials said, to drop off some goods before heading out to sea.
The vessel, named the Overseas Reymar, struck the so-called “Echo Tower,” or Tower 6, on the far east side of the bridge’s western span around 11:20 a.m., according to the Coast Guard. The visibility at the time was about a quarter mile.
At an afternoon news conference, Coast Guard Lt. Commander Shawn Lansing said there was no “spill or discharge into the water,” and everyone aboard was safe.