[flyingfrizzle]

On a fairly stock unmodified hull I would use silicon and pop-rivets with washers on the back side. Standard rivets alone can pull out but the aid of a washer in the back side will sandwich the glass between it and the head. Mmmmmm Sandwiches
On a heavy modified hull or one that has a lot of glass work done to it I may would take the time to glass and tab it to the hull. Lot of extra work but worth it if you have it tore apart that far.