> If you know the mass and radius of the object, you can calculate the tidal force. The issue is more the position of the object. Good luck doing trajectory co

> If you know the mass and radius of the object, you can calculate the tidal force. The issue is more the position of the object. Good luck doing trajectory correction for an object you can't see. The "throw a bunch of rocks" technique might help, but since they'd be unpowered they're not going to be following a trajectory that minimizes tidal force. It's still going to be enormously difficult to thread the needle through an invisible object that's going to tear you apart if you're not on the right trajectory. Perhaps the technique Beowulf Shaeffer used could work if it were done with instruments - measure the tidal forces aboard the ship and navigate accordingly to minimize them.