JohnnyBoy wrote:
"He will then see that the second observer catches up partially with the light moving away from the second observer;"

dehammer has no point. He doesn't understand elementary school level relativity.

He points out the issue rather clearly, above, when he says "if he can overcome the time dilation problem."

When pigs sprout wings and fly.

Time dilation isn't a problem to overcome ... it is the law.

DA Morgan