On Tue, 5 Jul 2005 18:05:20 UTC, "Bill Daniels"
wrote:

If the person hooking up the glider to the winch line shows these weak links
to the pilot, a crack in the primary will be obvious and can be quickly
replaced with a new one of the correct strength for the glider.

It's also easy to check that under light tension one link is taking
the load and one is free to rattle around, which is an easy way to
make sure that the primary link hasn't stretched, or got elongated
holes. The downside is that the metal holder for the links does tend
to get rammed full of mud on grass airfields.

Ian


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