That's what I wondered. Presumably it just means the ship can be even more off course / incorrectly aligned to the channel before it crashes? Edit: maybe there

That's what I wondered. Presumably it just means the ship can be even more off course / incorrectly aligned to the channel before it crashes? Edit: maybe there is a curve in the canal and the radius of the curve limits the length of ship for a given width. Widening it at the curve would let you build longer...