LED strobe may be a good idea.
FLARM is good at the head on case.
Tom



At 00:14 25 July 2012, son_of_flubber wrote:
So how many of us have flown along close to cloudbase under a cloud
street,
and suddenly seen another glider pass us on the opposite heading?

It's obviously hard to see a glider that is coming straight at you.

So what about a narrow beam LED strobe aligned with the glide path
vector... would the other glider see it? Would it be legal? Could you
shine it through the canopy with a baffle to block internal reflections?

Has anyone done this?

I once saw another glider coming towards me on a ridge with wing tip
strobes. It really got my attention and in plenty of time. So I kinda
think that this would work.