In your C-80 reference manual, check 7-20 and 2-8, you will see an explanation of the depth alarms. Having used these on sailboats for years, you may still find some shallow spots and have the alarm come on after the bow has "made contact". :wink: Assuming you have charts for where you're boating, you can check the soundings in that area. If you're gonna be where the water is skinny, go slow and easy. When I first started sailing in south Texas (known for lots of skinny water), an old salt gave me this advice: "Watch the birds. If they're long-legged birds standing in the water, you may be OK. If they're short-legged birds standing in the water, don't go there." At the time, I thought he was just being a smart-ass; turns out it was pretty good advice. We have always set the shallow depth alarm at 10 feet to give us advance warning with the trimaran (fast for a sailboat). Which leads to one of our family rules (set by the Blonde): "The speed in knots shall not exceed the depth in feet." :wink I'm thinking we may be able to get around that rule with the C-Dory.
And the window fogging situation: crack open a window and get a fan to blow on the windshield. Just like you would with the defroster in your car.