not many rules about where you can send.
Please DON'T send on REF030C or REF001C or any busy reflector.
Announce yourself and intentions before sending pictures.
Listen before you send
To others on the air, it tends to sound like silence or maybe beeping, in any case, Others may think that you are trying to talk but not getting any audio out. So please make sure that others know that you are sending first.
