Upgrades are refits a Workshop sells for credits. A Workshop stands only at an airfield with a runway. They belong to the pilot and one aircraft type: an upgraded Mi-8 keeps its upgrade through slot changes, despawns and restarts and at every airfield, and it is gone only when the pilot loses a Mi-8 (see Aircraft Losses).

The Workshop's upgrades add crate slots. The second stage replaces the first; they do not add up.

The extra slots only take a load that stays within the aircraft's rated payload (see Aircraft).

Upgrades are listed under Upgrades in the Radio Menu:

• Show my upgrades lists every upgrade per aircraft type, anywhere.
• Buy Upgrade appears on the ground at an airfield with a Workshop. An upgrade the aircraft already has reads fitted.
• Find nearest Workshop gives bearing and range to the nearest airfield with a Workshop.

Buying needs a linked Discord account. Equipment insurance keeps upgrades through a loss.

• Aircraft
• Credits
• Insurance
• Projects