If you were near the San Francisco waterfront over the weekend, you may have caught an odd sight floating by.

A large, wood-shingled, two-story home was gliding across the water, towed by a much smaller boat at a glacial pace on Sunday as it made its way from the Docktown Marina in Redwood City toward Sausalito. The U.S. Coast Guard confirmed to SFGATE the boat was still in transit on Monday afternoon.

The department has been monitoring the private transfer of the hulking watercraft, though Petty Officer Hunter Schnabel with Coast Guard Public Affairs said they weren’t notified ahead of time that it would be moving. But with a vessel that requires a large berth, Schnabel said it’s a “good best practice” to notify the Coast Guard so they can alert other boats to give it plenty of space.

He confirmed the Coast Guard will have crews continuing to stand by until the transfer is completed.