This afternoon we cut more holes in the hull to install four of eight Vetus opening ports. It was a bit disappointing to find the company does not provide cutting templates, but only a difficult to decipher measurements chart. So after some worrying we figured out how to use the inner faces and add back 7/16″, etc. Lots of pencil/ruler/scissor work but good results.
The forward ports – round one in the Water Closet and rectangles in the fore-cabin – are the heavy duty ocean hull side rated. The three in the aft cabin are cabin-side rated, meaning the seals and latches are less aggressive.