[dugout]

You are receiving good counsel. The topic begins with your expectations. I single hand. I, like many others, have come to the firm conclusion that if my center mass goes over the rail I’m dead. Ultimately, my system must keep that from becoming a possibility. Jack lines of any sort just couldn’t do that, bow to stern. Hard points, mid-ship, and short tethers were the answer stern to the mast with the addition of a halyard forward of the mast. This system affords security prior to entering the cockpit from below and in all tasks on deck.
I strongly suggest you follow Brion’s advice and access you and your crews ability to recover from where you end up after a knockdown with the proposed system. I did it and quickly realized I was not climbing back on board even in perfect conditions and 100% healthy. This system must begin with your own reality.