I don't know if any one or who can help me with this info ,I have a 05 3860 , and I want to drill a hole from the engine room up thru where the radar arch meets the decking, so I can run a sat tv cable up to the radar arch so I can hang a flat screen tv on it. I want to do this because the sat box is in the salon and I can get it into the engine room easy enough, then up thru the radar arch, is there any thing between the the decking and where the radar arch meets and Please no comments that I'm drilling thru the bottom of the boat I'm not, I want to be able to watch the JETS go to the Superbowl some day...