E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
Longboat.
Formerly the largest boat belonging to a ship, built so as to carry a great weight. A long-boat is often from 30 to 40 feet long, having a beam from 29 to 25 of its length. It has a heavy flat floor, and is carvel built.
