Deck hatches let in daylight but also let in unwelcome UV and heat. Gregg’s Sunbrella covers protect the boat’s interior from both, at left. Gregg further cut down the heat entering the boat by fitting reflective panels he cut from an automobile windshield sun screen, at right.

They block out heat, light, and prying eyes Issue 90: May/June 2013 When searching for our current boat, we developed a list of “must haves.” In addition to opening ports, we wanted more than one or t...