Even if the halyard still looks like new, the area directly behind the shackle is often affected. This is because this is where the rope works on the pulley when sailing or chafes at the exit. The danger here, even if the sheath of a Dyneema halyard is hardly carrying any load, is that as soon as it tears, the remnants could pile up and get jammed in the pulley when the halyard is fished. In this worst-case scenario, the sail could no longer be recovered. So there is no question: action is needed.
Depending on where sailors are currently travelling with their yacht, there are various ways to solve the problem:

Redakteur Test & Technik