Shipwright

You're trained in the art of building and repairing Spelljammer ships. You become proficient in the Arcana skill, in carpenter's tools and tinker's tools, and you learn the Mending cantrip, which you cast using Intelligence as the spellcasting ability. You have advantage on rolls to attune or unattune spelljammer helms. When you repair a ship, double the number of hull points restored by a successful or critically successful roll.