Matthew Riese said he constructed the hovercraft from a kit, building the body from scratch instead of finding an original DeLorean.
He has taken the craft, which is registered as a boat, to several Bay Area sites, including the waters near Emeryville, Calif., McCovey Cove near the San Francisco Giants' baseball stadium, and the Golden Gate Bridge on Jan. 12.
The hovercraft reaches 45 mph, not the 88 mph required for time travel in the movie, the San Francisco Chronicle noted.
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