Thanks, everyone.
By way of background I had caused the crack when I installed a screw for the window screen frame into the perimeter frame and the very tip of the screw contacted the glass. I heard a pop and then saw the crack migrating up the (outer) laminate of the glass
The cracked window is actually a sliding pane that moves behind a fixed pane when it's open. There's about an inch of overlap when it's closed, so I was forced to remove the fixed pane to get at the cracked slider. Last thing I wanted to do was pull the entire frame from the opening in the hull. I cut out the fixed pane yesterday using a long, thin, flexible razor type blade that's part of a Harbor Freight hobby carving kit. No way to get behind the overlap with anything conventional. The original bonding material looks like an elastomer.
I appreciate the advice.