Derek Copeland wrote:

If any anti-collision device of about the size, cost
and power consumption of a small portable GPS unit
becomes available, then I might be prepared to buy
one, especially if it doesn't require an externally
mounted aerial that reduces glider performance.


Derek, on how many of your best days of the year could you tell the
difference with a tiny external 1030-1090 MHz antenna? Yes, it's
expensive, but let's not get silly about performance degradation.

Not keeping the pieces of the glider flying in close formation will
degrade your personal performance considerably.


Jack