Development Neibur and Niemi consider
The Boat the third installment in a trilogy of films about a young married couple, beginning with
The Scarecrow (1920) and continuing with
One Week (1920). They also note the parallelism between the ending of
One Week, in which the couple's home is destroyed by a train, and the beginning of
The Boat, in which their house is destroyed by the boat. Keaton considered combining
One Week and
The Boat into a single four-reeler that would follow the adventures of a young couple. To that end,
Virginia Fox, who was originally cast as the wife in
The Boat, was replaced with
Sybil Seely, the wife in
One Week. However, the idea of combining the films was never realized.
Filming and special effects The boat launch, in which the vessel slides out of the launching ramp and sinks straight into the water, took three days to film. Technical director
Fred Gabourie had two boats built for the production—one to float and one to sink. However, neither vessel performed its function. The production crew initially weighted the boat meant to sink with approximately of
pig iron and
T-rails, but as the vessel slid off the ramp it slowed down instead of gliding underwater. Keaton later explained that an
undercrank could not be used because it would make the surface of the water "jumpy". The crew next constructed a breakaway
stern so the vessel would collapse upon hitting the water—but an air pocket in the nose of the boat kept the nose up out of the water. As a next strategy, the crew drilled holes all over the boat to ensure it would sink. But the buoyancy of the wood itself stopped it from sinking quickly. Finally, the crew towed the boat out to
Balboa Bay off
Newport Beach, California, and sank an anchor with a cable attached to a pulley mounted on the stern. At the other end, the cable was attached to a
tugboat, which dragged the boat under the water to complete the gag. Keaton and Gabourie also conceived the design of the boat's collapsible funnels, mast, and rigging which enable it to pass under bridges, in another inventive sight gag. ==Release==