I recently decided to go for radar and settled on the 2KW scanner from Raytheon versus the 4KW model. It was partly $$$ and partly because of the fact that boating on the Great Lakes doesn't involve navigating in tight waters (at least where I live). I mainly got it for safety in case I get stuck in fog. I would assume that I should be able to accurately see targets in fog at .5 - 5 miles with this unit. Some of the scuttlebutt I've been reading says that the smaller units are not that effective so I'm having second thoughts. What are your experiences? Also, I chose a mast mount and located just above the spreader (M383). Any lower would have blocked the deck light.