outrigger
1 An extension to each side of the crosstrees of a sailing vessel to spread the backstays, in a schooner the topmast backstays, and in a square-rigged ship the topgallant and royal backstays.2 A type ...
pontoon
1 A flat-bottomed boat often used as a lighter or ferry.2 A boat of special design to support a temporary road or footbridge across a river.3 A hollow, watertight structure used in salvage for its ...
