Silence is golden, but in the air, it is not.
If in doubt, speak, let the whole world (or frequency rather
) know where you are and what you are doing.
If you hear someone else, and let them know you are there, make sure you know they know, if they don't reply, then bug them till they acknowledge you.
But there's still more!!!
Trap for young players, the best method is still to open your eyes, keep a scan of the skies. There is alot of air up there, but chances are, as our old buddy Murphy has said, there will be someone right up your clacker when you least expect it.
SEE AND AVOID!!
(edited due to dyslexic fingers)