Space Galleon

The space galleon is a mainstay among the host of vessels that ply Wildspace and the Astral Sea. Space galleons can easily pass for ordinary seafaring galleons. Because they can land on water and move across it like their namesakes, they can sail into ports on terrestrial worlds without attracting undue attention. Like an ordinary galleon, a space galleon isn’t built to land on the ground (its keel would cause it to roll on its side). The ship’s standard weaponry includes two forward-mounted ballistae and an aft-mounted mangonel.

Typically 130 feet (40 meters) along the keel and 30 feet (9.1 meters) 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 are considered some of the most advanced sailing vessels among "groundling" humans, and were considered to be the capital ships at the forefront of the Navy's of Cormyr, Impiltur, and Sembia as of the Year of the Serpent, 1359 DR on Toril.  Even in these relatively wealthy countries, the galleon was not a common sight on the Inner Sea.  They are quite seaworthy, but are relatively slow and difficult to maneuver. Because of significant weight in the structures mounted high above the waterline, prudence was required to avoid capsizing.

Spelljamming

Among "groundling" humans, a galleon was the vessel most likely to be converted into a spelljammer, a spacefaring vessel, by mounting a spelljamming helm on the craft. One such craft from the time of the Netherese Empire was preserved after that nation's fall in the desert of Anauroch within the ruins of Hlaungadath. As late as 1358 DR, the lamia living in the ruins could not figure out how to operate the ship and make it fly again.