The Dropship effect is printed on the Sequence board.
Each of the 7 Dropships provide the same effects when boarded: Maneuver A, then land onto an unoccupied planet in your current sector (if able) to resolve its effects B.

After you have successfully landed on an unoccupied planet:
1 If there is a Discovery Data cube on the planet, gain it immediately.
2 Resolve the effects of the planet printed on the card, which is always one option out of two choices.
The bottom option on a planet represents the corrupted part of it. When you choose that, you must count it toward gaining Corruption in the Gain Corruption step of your turn (see Resources and Corruption).
You can find the complete list of planets in the Glossary category.