{ "type": "object", "description": "The engine determines how quickly a ship travels between waypoints.", "properties": { "symbol": { "type": "string", "enum": [ "IMPULSE_DRIVE", "ION_DRIVE_I", "ION_DRIVE_II", "HYPER_DRIVE" ] }, "name": { "type": "string" }, "condition": { "$ref": "./ShipCondition.json" }, "speed": { "type": "number", "minimum": 1 }, "requirements": { "$ref": "./ShipRequirements.json" } }, "required": [ "symbol", "name", "speed", "requirements" ] }