riverman wrote:

6) Now, you are practically done. Your midline straps are only to
keep the
canoe from slipping sideways on the roof racks. As such, they only
have to
loop over the boat and secure on the roofracks. The fact that you
asked if
you ought to run them through the windows shows that you weren't sure
which
lines secure your boat. Some folks don't even use midline straps; a
buddy of
mine just has little bumpers he uses to keep the boat from moving
sideways.
If you try to tie on a canoe without end lines, you run the risk of
the boat
'twisting' on the roof and coming right off, regardless of how hard
you haul
down on the midlines. No matter what you hear from other people,
trust me on
this, USE END LINES!

That's an interesting theory. I've always tried to put the bow behind
the front of the car, that way the wind will actually tighten the line
running from the bow to the front of the car. I see your point though.
I'll have to think about this.