New rules question since this thread has been nearly on life support for 10 months.
You are playing a 520 yard par 5 hole. There is a 220 yard long lateral water hazard left of the fairway starting at the tee, and the fairway cuts left around the end of the hazard. Also there is a group of 40-50 foot tall trees at the end of the hazard so a carry must be more like 260 yards with a high trajectory to clear. The hazard extends left to the course boundary and the boundary is marked by a chain link fence with about 15 feet of dry land between the fence and the water, but that strip of land is still part of the hazard.
You attempt to hit your tee shot with a draw to carry the hazard and set up a reachable approach shot, but instead hit a bit of of a duck hook. The ball crosses into the hazard about 100 yards from the tee, but carries across the water and you see and hear the ball hit the chain link fence, but no one sees the where the ball deflects to. When you get the the area where the ball hit the fence, you don't see it on the ground. The area out of bounds is grown in weeds and grass, and nothing is visible there either. There is no way the that ball could have defected far enough to get out of the hazard unless it went through the fence and lies out of bounds, but there are also tall weeds on the hazard side of the fence, so the ball could easily be lost there.
Question - what is your procedure at this point?
"Your proper place on the course is directly behind the group in front of you, not directly ahead of the group behind you."
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