Dreadnought is a long flat-bottomed punt in Coot Club which was Tom's first boat, and which he made himself. He paddles it with a single paddle like a Canadian canoe, and still finds her useful for slipping along by the reeds ... watching grebes (CC3).

Later Tom hides her underwater from the Margoletta, using the Teasel's heavy "mud-weight" open-water anchor.

She is named after the innovative British battleship of 1906.

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