This is instructive of a general concept. When a card has multiple abilities, each can be generated individually, provided you can meet the costs. Since the jettison ability doesn't require you to

, you can use it even when the card is exerted.
Many cards have multiple abilities. Sometimes, as in the case of Vorn Drusus, each has

as part of the cost. This means you must either choose which to use, or find a way to

the card. Others, like George Zamepiimakha (no clue if that's spelled right) do not require the card to

.
When you start moving beyond the preconstructed decks to building your own, you're going to want to look at the abilities on the cards, and their costs. Where do they compete with each other, or with other cards? If you

a

, that

isn't going to be able to do a

, as one example. So if you're running a lot of crew abilities requiring

, you may not include as many

or

(if you're interested in their

).