|Bill is... concerned, about this reentry trajectory.|
|MX re-entry vehicles over Kwajalein, following their launch aboard an MX missile some 30 minutes earlier from Vandenberg Air Force Base in California, October 1985.|
The big factors affecting reentry are the time when fire your retro-rockets, and how much you slow down. You want to be accurate about this because a little too much or too little, too soon or too late, can easily kill you. But after you've fired the retro-rockets there isn't much you can do except pray.
Except I seem to recall something about Orion being able to adjust it's attitude, which could easily affect it's trajectory, except how can you tell? GPS will be useless as the fireball you generate as you plunge into the atmosphere pretty much ruins any chance to sending or receiving any radio communications. Well, how about inertial guidance? That used to require big heavy chunks of equipment that was marginally accurate and marginally reliable, but I think we've gotten better at it. So it's not inconceivable that Orion was able to steer itself quite accurately.
Once you deploy the parachutes, you kind of lose your steering capability, but you also become much more visible, so the pickup crew should be able to find you. As if they haven't been tracking you on radar since you appeared over the horizon ten minutes ago.
This video has some odd bits, but it also has some good shots.
Other posts about Orion. Most of them are about the spaceship, only a couple are about the airplane.
A couple of other posts about reentry.
Some posts about inertial navigation.
Update January 14, 2015. Just received an automated reply from NASA about this issue. As you might expect it contained no useful information.