"PaulaJay1" wrote in message
...

It is my memory that about 30 years ago a number (like 25) people
were drowned in Lake Erie by this type mistake. The photo plane
was in the right position over land and the jump plane was over the
lake (above cloud cover). Radar advisory confused the two and
told the jump plane he was in position. Don't know, didn't they
have transponders then?


They existed then, but they were less common.