How are exact measurements dealt with when maneuvering?

For example, in the previous round Luke's Xwing has bumped straight into the front of Captain Yorr's Lambda. In this round, Yorr selects a 0 maneuver, and Luke selects a 2 Straight maneuver. Yorr doesn't move, but gets no actions due to performing a red maneuver. Now the tricky part.

Since the base of a large ship is the same as the 2 maneuver, does Luke get past the Lambda or does he overlap it? Does he get past it, but is considered touching the back face? This is important because it has bearing on positioning, action resolution, and modifications such as anti-pursuit lasers.

The new rulebook has this to say:

"Sometimes a round will end with two ships
touching each other, parallel, and facing the
same direction. After both ships execute
a maneuver, boost, or barrel roll, they are
not touching (even if their bases are still in
physical contact) unless they overlapped"

However, this only talks about ships facing the same direction before the move. Is there an official ruling anywhere?

The big question is simply "will Luke actually clear the shuttle?"

When dealing with nose to nose contact the nubs often become an issue but IF a ship can jump over a ship and avoid that problem then it is now free and clear. Note that if it could NOT completely jump the ship and be clear then it would be getting blocked all the way back to its starting position.

Either you hop the ship and are clear or you will overlap the ship and get pushed back to where you started from.

Luke's 2-straight will not clear the Shuttle. He will bump into Yorr.

I've measured my templates against the ship bases, and I've found they aren't the same. The templates are a millimetre or two shorter, so you can't use that as a guide. And as StevenO points out, the nubs will come into play for the purposes of the overlap. This will add an extra few millimetres to the equation and still result in an overlap.

So in your example, the X-wing would fail to make it away and thus move back down it's template to the starting position. It has performed a maneuver, it just doesn't move, and it skips it's Perform Action step as normal.

Since the base of a large ship is the same as the 2 maneuver ...

It isn't. The template is shorter. By design. That results in an overlap.

Same as the 1 straight template and a small base.

So I guess the Lambda says to the Xwing "Yorr not going anywhere"

Sorry, couldn't resist.

Thanks for the answers guys.