This is an interesting thread. Morning Star has port lights but no "windows" per se, so this provision of the SER was "not applicable" to our race preparations in 2018. Or so the thinking went at the time.
We do, however, have 2 cabin-top hatches with 20"x20" Lexan lenses: one mid-cabin top and one on the fore deck over the V berth. Perhaps these hatches should have been considered "windows" for purposes of SER 2.1.2. I don't know. Both seem quite solid and neither leaks, but both show minor crazing typical of their age and it would be a disaster if either failed at sea with no means of repair. The hatch on the fore deck is of particular concern, taking hits from some pretty good waves from time to time. Critter's system could be easily adapted for these hatch openings, and so I am adding that to the to-do list in preparing for this year's sail to Hawaii. Thanks!
Lee
s/v Morning Star
Valiant 32