<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:14pt"><div>Hi,</div><div>I'm not covering much in this section because if I started on construction</div><div>regulations, I would just be duplicating what was printed.</div><div>G.L. wants you to have manufacturer certificates for every non structural screw.</div><div>Any company you contract to do your welding has to have their facilities, personal</div><div>& supervision approved by G.L..</div><div>Some points of interest are.... hatches need to be opened from both sides, they need</div><div>to be able to be secured open, they need to be designed in a way that opening of the</div><div>hatch is only possible after equalization. Two measures are required to guarantee that</div><div>the hatches are closed & secured before diving; one measure is to be visibly noticeable.</div><div>Mechanical
measures for stopping a banging of the hatch is required.</div><div>Any external through hulls are to be protected against damage by appendages or covers.</div><div>If you are doing calculations on a computer you have to prove that the program is suitable.</div><div>Alan</div></div></body></html>