A very kind & generous neighbour, indeed!
I don’t quite understand the exact nature of your query, but perhaps this may help:
Excerpted from the The USS Sailing Foundation Harness & Tether Study (1999):
At ➥ http://offshore.ussailing.org/Assets...ther+Study.pdf
:... We generally consider a tether with a quick release shackle at the inboard end to be an important feature; however, we tried to test as broad a spectrum of hardware
as possible to see if there might be any lessons learned. We did come to this conclusion: quick release snap shackles are robust, as are the locking, gated snap hooks (the Wichard and Gibb hooks). Snap hooks without a gate, even the well-respected Wichard forged models, and most of the other non-locking hardware
, have too high a failure rate to trust your life to them. Also, snap hooks have been known to pickup a lazy jib
sheet while walking along the deck
, and can come undone if twisted on a padeye in a not uncommon manner...”
➥ US SAILING - Safety At Sea - Safety Studies - 1999 Harness and Tether Study - Appendix I - Standard Harnesses
I believe that Survival Technologies may now be owned and manufactured by the Switlik Parachute Company, but I don’t see their Harness’ and Tethers listed:
➥ Switlik - Marine Catalog - Overview
I always used a 5 Ft. construction safety
belt lanyard, doubled (looped) round the Jackline, with both ends safety
snap-shackled at the harness D-Ring.
As needed, the tether (lanyard) could be un-doubled and shackled directly to the Jackline for extra length.