If you don't want to fly a standard rescue mission and you're really feeling particularly bold or foolhardy, you can try selecting the Cube ship option in the Mission Setup dialog. (but the galaxy will NOT thank you for it!!)
The Cube ship is all-powerful and totally destructive. It will systematically annihilate the entire galaxy, including the Enterprise. When it eventually finds you, it will use a cutting beam to relentlessly cut through your hull until you explode.
If this doesn't appeal to you, DON'T select the Cube ship in your mission! (Note: it CAN be destroyed, but it isn't easy...)
• EVASIVE MANEUVERS
Under the Starfleet menu you'll find three preset evasive maneuvers which you can use to try to evade enemy fire. The maneuvers vary from 5 sec to 15 sec in duration.
Checking the "Evade Continuously" option means that once you select a maneuver, the Enterprise will continue to repeat the evasive maneuver until you click "Stop."