Uncatena was a sidewheel steamer operating as a ferry serving the island of Martha's Vineyard during the beginning of the twentieth century.

[3] The Vineyard Gazette wrote in June 1961: The Uncatena, built in 1902, was 187 feet long, and had a 31-foot beam.

An innovation in her construction was the placing of her shaft low enough so that passengers, boarding the boat by way of the freight deck as was often necessary, walked over it on an incline.

She had a guaranteed speed of 15 miles an hour, and she often showed her heels to other boats of the line.

The Uncatena was the only sidewheeler of the Island line to have a poem, written to her and about her by the Pulitzer Prize poet, Robert Hillyer, in 1948.