jack stay/line

[buckborough]

i was wondering if there were any guidance or advice concerning the use of hi-tech line for jack stays or jack lines which are normally fabricated from ss wire or webbing. these are the lines which run along the deck and to which you attach the tether from your harness. the recommended breaking strength for these assemblies varies between 4,000 - 6,000 lbs. the particular application i have in mind would involve tying the line off to a shackle so if i were to go forward with this, i would require a strong no stretch line i could put a knot in. uv resistance and chafe are also concerns. any experience with such application or generic product recommendation would be appreciated. thank you for your kind attention to this question.