I am not sure about the thickness of my roofdeck sheathing.
But am thinking of going with the power fan vent anyway, since it is what has seemed to work well for me over the past 23 years.
I am still trying to determine how much more soffit venting I need.
Some framers will let a 4 inch wide piece of plywood suffice for the last piece on the peak.
In this case cutting an inch away for the ridge vent is not a good idea.
Unless one plans to add blocks underneath.
In answer to your question: You have a gable style roof. It also looks like you have some additional Gable end venting of a type I've never seen before that looks like short horizontal slits built into the siding up near the peak of the gable.. Unless that's one of those optical illusions that seems to happen with some digital cameras.
Why run a power vent when gravity will work for free?