Whitehall boats were first built in the 19th cent. at the foot of Whitehall street, and were particularly adapted to ferrying goods and personnel within the harbour. They later became popular recreationally, and were known as ‘the bicycles of the sea’..
Origin
Early 19th century; earliest use found in National Advocate. From Whitehall, the name of a street located at the southern tip of Manhattan + boat.