Liane - maybe on the older models the external porthole in the forepeak didn't open, but on the 2016 450F that I have in the TMM fleet (Ariadne) the porthole absolutely opens. My crew member that used it commented that with the porthole open, and the hatch cracked open above, and the electric fan running, it was perfectly comfortable... and he was in his late 40's! A teenager should be fine
Just need to be very disciplined about shutting it in the morning before slipping the mooring...
The 'escape' hatch back into the part of the boat, through the W/T bulkhead to the double cabin, is not a simple thing to have open. Its heavy, swings on a hinge across the top, and is covered by a mirror on the bulkhead in the double cabin. So - not a simple access point.
Feel free to ask if you have any more questions about the 450 - she is a fabulous model boat.
Graeme
