Originally Posted by IO540
I would think that is highly "unapproved". You may as well make the calls on 121.50 - there will be a whole lot more people listening
Without radar, position reports are of almost no value.
If I hear someone make a blind call to "Shawbury traffic", stating that they are transiting the MATZ from X to Y at Z feet, heading for the low-level route, and I'm in the vicinity, it improves my situational awareness in exactly the same way as it would if they were addressing "Shawbury Zone".