Jettison — exhaust target crew an opponent controls.
Explained
Exhaust target crew an opponent controls.801.13d
Choose one of your opponent's crew on board when you deploy it; without one, you can't deploy it. It is exhausted: it can't be dispatched, so it doesn't defend or go to an expedition, and can't pay an Exhaust cost; it becomes ready in its owner's stoke phase. If it has left the board by the time this resolves, nothing happens (801.13d).
Jettison — exhaust target crew an opponent controls.802.7
When a Recon puts this card into your scrapyard, you may use this. Not when it is scrapped, dug or destroyed. In the sortie phase it goes into the crossfire first, and it can't be used if the card has left your scrapyard by then (802.7). Choose one of your opponent's crew on board when it happens; with only one, it is chosen, and with none, nothing happens. An exhausted crew can't be dispatched, so it doesn't defend or go to an expedition, and can't pay an Exhaust cost; it becomes ready in its owner's stoke phase (801.13).