Air Boat
Invented by Alastair Brume, Air Boats are recent inventions that have recently revolutionized the travel and trade across Lindrinor, especially on long-distances (like travelling across different continents). Some say it was only due to this invention that the Republic Federation of Rockvar have recently grown their Trade Economics so much, since it allowed trade between different societies of the globe.
Power Generation
This vehicle only produces Gravity Power through the use of levitation magic by activating Brumestones
Propulsion
Horizontal Propulsion is made by the use of the winds (just like a regular sea ship would)
Vertical Propulsion, however, is produced by something different entirely. Regular sea ships get that from staying afloat in water. Air Boats, however, get that type of propulsion from magically activating large amounts of Brumestone, which in turn levitates objects (such as air boats).
Weapons & Armament
Air Boats usually have many mounted crossbows and harpoons spread across the sides of the ship. Furthermore, many also have cannons on the lower decks.
Armor and defense
Air Boats usually have regular wooden hull defenses. However, the resistance of the hull depend on the type of wood used and whether or not it contains magical defensive enchantments.
Communication Tools & Systems
There is usually a Telemail Apparatus on each Air Boat, for sometimes communicating with the ground is fundamental.
Sensors
Air Boats usually carry sunlight power and wind sensors, for these are important factors that interfere in this type of travel.
Hangars & docked vessels
Usually at least one Air Speedboat is strapped to the side of Air Boats
Nickname
Wood Bird
Creation Date
First was built in 496 BBE
Owning Organization
Price
100.000 gp
Rarity
Very rare (specially BBE)
I like that Air Boats are reliant on a particular resource found in your world (Brumestone) for the levitation, and that there are smaller boats associated with them (that I guess can be used as lifeboats?)