Galleon

A galleon was an advanced sailing vessel, the largest used by Cormyr, Impiltur, and Sembia as of the Year of the Serpent, 1359 DR. Even in these relatively wealthy countries, the galleon was not a common sight on the Inner Sea.

Description
Typically 130 ft (40 m) along the keel and 30 ft (9.1 m) across the beam, galleons had three full masts and three decks that could hold a maximum of 800 crew and passengers. With multiple sails and complex rigging, it took a minimum crew of 80 to operate proficiently. The galleon had castles at fore and stern that were usually armed with a total of three large weapons (ballistae or catapults, for example).

Galleons were quite seaworthy, but were relatively slow and difficult to maneuver. Because of significant weight in the structures mounted high above the waterline, prudence was required to avoid capsizing.