Well, I guess I would have an arc welder and some plates to repair any damage to the hull. Depending on how fast you're going dust and micro meteors could wreak havoc on a space craft. I don't think that stuff would be detectable because of their small size. This is why one of the tropes in Sci Fi space books and movies are shields. One way to look at it is what would you have on a sub for emergencies. You don't want water flooding into your hull any more than you want air escaping. The same could be said for a spacecraft.

Another thing to consider is size. The Titanic for example collided with an iceberg with relatively low speed. Because of the mass of the two objects it caused a lot of damage. Conversely smaller objects traveling at high velocity could also cause lots of damage. You may be able to detect and avoid an asteroid tens of yards across but something smaller may go unseen until it punctures your craft. Ideally you would have pressure sensors aboard your craft to detect any leaks or drops in cabin pressure.