Privateer Coat

Wondrous item, rare (requires attunement)
  Worn to shield crews of airships against cold and violent winds, this jacket is equipped with pockets and pouches fit for repair tools and weapons. Some coats are adorned with decorative shoulder pads and pins to distinguish rank and aerial prowess.
  While wearing this coat you have advantage on checks and saves made to overcome the effects of cold weather or violent winds. You also gain advantage on saving throws against spells that deal cold damage. Finally, you have advantage on Charisma checks against any creature that recognizes your uniform as a higher authority than itself. Roll a d4 to determine the rank; 1 - petty officer, 2 - lieutenant, 3 - captain, 4 - admiral.
  Repair Adept. While attuned to the coat, you can cast the mending cantrip at will.
  Aerial Messaging. When operating any aircraft you can write a message in the sky, creating one letter each 30 seconds. The letters last for 1 hour on a calm day, 10 minutes in a moderate wind (at least 10 miles per hour), or 1 minute (at least 20 miles per hour). Your flying speed is halved for the duration of your message-writing.