Rules on portlight locations

Having trouble finding a rule that gives acceptable height of port holes and required thickness. Im assuming that they must be above a certain heeled waterline and that there is a calculation for required diameter and glass thickness. The boat that they will be used in is a large wooden scooner(Pinisii) built in Indonesia. To maintain the classic look of the yacht classicly styled portlights are desired by the owner(ie bronze rimmed)

Id appreciate any information on a rule, the boat is being designed to GL. Thankyou

 

not at all, providing you use approved for type, then they are often underwater when A YACHT HEELS, so they must withstand the hose test, using Lewmars, goight, weaver, or all the named brands,
on some older superyachts which sailed rail down, the portlights had auto closing mechanisms
I have seen hatches on the inside of Cat hulls down near the wl, doing circumnavigations, not for me, but there you are
you can make custom ports with 10mm toughened glass, or if the ports are not so big 6mm
google maxwell winches, look up portlights hatches

 

also do not forget to add deadlights to the portlights (or scuttles as the English would have it).

 

If you contact GL they will tell you (or direct you) to their requirements.

or wade through these:

http://www.gl-group.com/infoServices/rules/pdfs/english/glrp-e.pdf

 

For Sub T the load the vessel can carry is reduced to the hight of the ports.

The vessel is healed with 180 lbs per passenger weight on one side and when half the freeboard to the bottom of the port,is immersed , that's the load.

For a sailing vessel the selection of metal deadlights (inside dogable port covers) that will make the vessel watertight , even with damaged glass is the usual.

FF