Robert C. Pringle, originally named Chequamegon, was a wooden-hulled American tugboat that sank without loss of life on Lake Michigan, near Sheboygan, Wisconsin, on June 19, 1922, after striking an obstruction (possibly floating driftwood).

At about 2:00 a.m. on the following day, as the vessels were passing Sheboygan, Robert C. Pringle struck an obstruction (some contemporary reports state a piece of driftwood) and began taking on water fast.

Despite her pumps being in operation, the water eventually extinguished her boilers, forcing her crew to abandon her and row to Venezuela.

In the summer of 2019 it was subjected to a thorough archaeological survey by the Wisconsin Historical Society, who described the wreck as "remarkably intact".

The wreck of Robert C. Pringle was listed on the National Register of Historic Places on December 14, 2020.

[5][6] A single 10.5-by-11-foot (3.2 by 3.4 m) 175 pounds per square inch (1,210 kPa) Scotch marine boiler supplied the engine with steam.

[6][10] In the middle of September, her trips to Madeline Island were discontinued, and she was moved to Duluth, Minnesota, where she was fitted with a new propeller in order to improve her speed.

In June of that same year, Chequamegon began transporting passengers from Milwaukee to Pabst's Whitefish Bay Resort.

Chequamegon resumed her trips for Pabst's Whitefish Bay Resort, briefly engaging in the fruit trade in September 1906.

The vessels departed Milwaukee at around midnight on June 18, with Robert C. Pringle under the command of Captain Martin Oglesbee.

[21][22] Her wreck is upright and was described by the Wisconsin Historical Society as "remarkably intact on a sand and silt covered lake bottom, with little damage or deterioration".

[20][26] Media related to Robert C. Pringle (ship, 1903) at Wikimedia Commons Cave dive sites: