Peek-a-boo!
During the heat-wave last weekend, I removed the cover on our front room ceiling hatch. As a historical note about the boat, this hatch was apparently installed in order to put in a retractable ladder to the upper deck (for reasons lost to the mists of time...) but was since covered over with a lid. I discovered the lid was still mobile, so we pulled it off to help vent the hot air. This worked well for about three days, but then Jasper discovered that he could make the jump from the kitchen table out the hatch, so the cover is back on until I investigate some proper sunroof options.