On 9 Apr, 16:15, Nyal Williams wrote:

What have you heard? *Anyone have any comments to offer?

As well as the spoken and light commands I have used

single bat: bottom quadrant sweeps = "take up slack", top quadrant =
"all out", held above head = "stop"

double bat: same, with scissoring movements below and above for the
first two

no bat: rock wings = "take up slack", hold level = "all out"

As a winch driver I detest lights unless automated, because the
quality of signalling is dreadfully variable, particularly when people
forget the time lag in an incandescent bulb. I'd ban all light
signalling if I could. Bats are fine, as are clearly spoken words on a
telephone. "All out" just the once is fine, guys, you don't have to
keep yacking at me.

Ian