MorningBird said..
I put a strong padeye, not the cheap ones, on the deck outside each side of the cockpit at the front of the cockpit/aft end of the cabin. The jacklines run to the bow cleats. You clip on inside the heady sheet and can go to the bow without any interference.
MB also has a ring in the cockpit underneath the hatch to clip on before coming out of the cabin.
Using the stanchions might be a simple expedient method for attaching jacklines, I would suggest to leave the stanchions for their normal purpose and run the jacklines on their own secure points. You would normally slide or fall onto the lifelines with multiple stanchions taking the load. The jackline may put more load on a single stanchion.
Use the folding Wickard pad eyes for cockpit strongpoints. Flat webbing jack lines are best as they do not roll underfoot and create a trip hazard. Suggest run a jack line along the centre of the cockpit so that clipped on persons can't fall out of the cockpit. Adequate strongpoints for helmsman. In a big seaway if standing at the wheel going downhill I like to clip on to both strongpoints and effectively be lashed to the wheel.
Not permissible under special regs to use staunchions as jackline attachment points. Use cleats or dedicated pad eyes.
Do get some expert advice on the location of jack lines and tethers.
Out of interest we had some custom jack lines made up in Marbehead Masachusetts USA. The sailmaker had made all of the "safety" lines for Circus Soliel and assisted somebody doing a PHD thesis on the strongest method of sewing loops into webbing. It's actually surprisingly scary how little stitching is used. There is a very fine balance between too little stitching being the weak link against too much stitching weakening the webbing. I must admit that every time I inspect my jack lines I just hope that this guy wasn't just talking crap.
Ppl
Edit
Just looking at pics of my stormboards . Cisco or HGO2. Would you like to visit Geelong and give me some instructions on applying varnish. I have never applied a coat of varnish to any boat that I have owned and it does show.