The North Atlantic heating up in the last week got me working on preparing our new-to-us J/109 for a strike.
We have always added a backup pendant before expected winds of storm force or over, but in the past it was chain. Now, with a smaller boat and the availability of high-modulus rope, we are going with 1/2″ Dyneema 12-strand single braid. Spliced it up yesterday.
Given that the break load is three times more than the boat weighs, it should be strong enough, but of course chafe is always the issue, more than strength.