Anonymous ID: 23481a Sept. 1, 2018, 1:58 p.m. No.2836911   ๐Ÿ—„๏ธ.is ๐Ÿ”—kun   >>7254 >>7262

>>2836882

It means that the plane is deliberately not transmitting it's call sign. If the pilot forgot to type in the Squawk ID, then you'd see 'No Callsign'.

 

Blocked flights are usually logged as data points as the reason for the blocked flight may come to light in the news tomorrow.