I’ll bet that if you thought hard about it, you could come up with some way of letting that potential traffic know where you are and where you’re going, in a broadcast of no more than 10 seconds' duration, in each case.
I bet in many cases, such a landing ground might be below the level at which two way comms with ATC are achievable. In such a case, you would not hear Centre but only any high flyers that were transmitting. There is as a result that any transmission you make on Area may over-transmit other ATC related transmissions. For this reason, it is obvious that such transmission should be avoided. It was also the reason that the Multicom was introduced.
Bottom line is keep a good lookout!
