(snip)A pilot here in Colorado recently bought an LS-3 that had been based
in Moriarty. When I brought him the tow rope, I found it had been
fitted with an Applebay Zuni 'chin' hook. Nice addition to a glider
that will be frequently flown from sites that frequently get some
squirrelly crosswinds.

Frank Whiteley (snip)

What is a chin hook?

Thanks, Bagger